1.

C. J. Amlaner Jr , R. Sibly & R. McCleery . 1978. Effects of transmitter weight on breeding success in Herring Gulls. Biot. Pat. Montn. 5: 154–163. Google Scholar

2.

M. Andersson & R. À. Norberg . 1981. Evolution of reversed sexual size dimorphism and role partitioning among predatory birds, with a size scaling of flight performance. Biol. J. Linn. Soc. 15: 105–130. Google Scholar

3.

W. H. Armstrong 1958. Nesting and food habits of the Long-eared Owl in Michigan. Mich. St. Univ. Publ. Mus. Biol. Ser. 1: 61–96. Google Scholar

4.

J. Aschoff & H. Pohl . 1970. Der Ruheumsatz von Vögeln als Funktion der Tageszeit und der Körpergrösse. J. Ornith. 111: 38–47. Google Scholar

5.

N. P. Ashmole 1962. The Black Noddy (Anous teuirostris) on Ascension Island. Ibis 103: 235–319. Google Scholar

6.

G. W. Barrett & C. V. Mackey . 1975. Prey selection and caloric ingestion rate of captive American Kestrels. Wilson Bull. 87: 514–519. Google Scholar

7.

G. A. Bartholomew , J. W. Hudson & T. R. Howell . 1962. Body temperature, oxygen consumption, evaporative water loss, and heart rate in the Poorwill. Condor 64: 117–125. Google Scholar

8.

K. Becker 1958. Die Populationsentwicklung von Feldmäusen (Microtus arvalis) im Spiegel der Nahrung von Schleiereulen (Tyto alba). Zeitschr. f. Angewandte Zoöl. 45: 403–431. Google Scholar

9.

F. G. Benedict & B. L. Fox . 1927. The gaseous metabolism of large wild birds under aviary life. Proc. Am. Phil. Soc. 66: 511–534. Google Scholar

10.

A. C. Bent 1938. Life histories of North American birds of prey. Pt. 2. U.S. Nat. Mus. Bull. no. 170. Google Scholar

11.

M. Berger & J. S. Hart . 1974. Physiology and energetics of flight. In: D. S. Farner et al. (eds.), Avian Biology, vol. 4. Academic Press, New York. Google Scholar

12.

M. H. Bernstein , S. P. Thomas , and K. Schmidt-Nielsen . 1973. Power input during flight of the Fish Crow (Corvus ossifragus). J. Exp. Biol. 58: 401–410. Google Scholar

13.

H. Biebach 1979. Energetik des Brütens beim Star (Sturnus vulgaris). (J. Orn.) 120: 121–138. Google Scholar

14.

H. Biebach , R. Drent & S. Haftorn (in press), Avian incubation. Proc. XVIIIth. Int. Ornithol. Congr. (Moscow). Google Scholar

15.

D. M. Bird & S. K. Ho . 1976. Nutritive values of whole-animal diets for captive birds of prey. Raptor Res. 10: 45–49. Google Scholar

16.

R. C. Birkebak 1966. Heat transfer in biological systems. Internat. Rev. General Exp. Zool. 2: 269–344. Google Scholar

17.

C. R. Blem 1975. Energetics of nestling House Sparrows (Passer domesticus). Comp. Biochem. Phys. 52A: 305–312. Google Scholar

18.

P. Bohnsack 1966. Über die Ernährung der Schleiereule in einem Westholsteinischen Massenwechselgebiet der Feldmaus. Corax 1: 162–172. Google Scholar

19.

P. C. Boxall & M. R. Lein . 1982. Territoriality and habitat selection of female Snowy Owl, Nyctea scandiaca; in winter. Can. J. Zool. 60: 2344–2350. Google Scholar

20.

I. L. Brisbin Jr 1969. Bioenergetics of the breeding cycle of the ring dove. Auk 86: 54–74. Google Scholar

21.

J. L. Brisbin 1970. A determination of live-weight caloric conversion factors for laboratory mice. Ecology 51: 541–544. Google Scholar

22.

Brody, S. 1945. Bioenergetics and growth. Reinhold (repr. Hafner Publ. Co.), New York. Google Scholar

23.

W. S. Brooks 1968. Comparative adaptations of the Alaskan Redpolls to the arctic environment. Wilson Bull. 80: 253–280. Google Scholar

24.

H. Bruns 1965. Winterliche Ansammlungen von Waldohreulen in den Städten. Orn. Mitt. 17: 6–9. Google Scholar

25.

K. H. Bruster 1973. Brut-, Wintervorkommen und Nahrung der Waldohreule, Asio otus, im Hamburger Raum. Hamb. Avif. Beitr. 11: 59–83. Google Scholar

26.

O. de. Bruyn 1979. Voedseloecologie van de Kerkuil, Tyto alba, in Nederland. Limosa 52: 91–154. Google Scholar

27.

P. J. Buttery & K. N. Boorman . 1976. The energetic efficiency of amino acid metabolism. In: D. J. A. Cole , K. N. Boorman , P. J. Buttery , D. Lewis , R. J. Neale & H. Swan (eds.). Protein Metabolism and Nutrition. Butterworths. London. Google Scholar

28.

B. W. Cain 1973. Effect of temperature on energy requirements and northward distribution of the Black-bellied Tree Duck. Wilson Bull. 85: 309–317. Google Scholar

29.

W. A. Calder & K. Schmidt-Nielsen . 1967. Temperature regulation and evaporation in the Pigeon and the Roadrunner. Am. J. Physiol 213: 883–889. Google Scholar

30.

W. A. Calder & J. R. King . 1974. Thermal and caloric relations of birds. In: D. S. Farner & J. R. King (eds.) Avian Biology, vol. 4: 259–413. Academic Press. New York. Google Scholar

31.

A. S. Cavé 1968. The breeding of the Kestrel, Falco tinnunculus, in the reclaimed area of Oostelijk Flevoland. Neth. J. of Zool. 18: 313–407. Google Scholar

32.

V. Ceska 1980. Untersuchungen zu Nahrungsverbrauch, Nahrungsnutzung und Energie-haushalt bei Eulen. J. Orn. 121: 186–199. Google Scholar

33.

D. Chitty 1938. A laboratory study of pellet formation in the Short-eared Owl, Asio flammeus. Proc. Zool. Soc. A. 108: 267–287. Google Scholar

34.

R. J. Clark 1972. Pellets of the Short-eared Owl and the Marsh Hawk compared. J. Wildl. Mgmt. 36: 962–964. Google Scholar

35.

R. J. Clark 1975. A field study of the Short-eared Owl, Asio flammeus, in North America. Wildl. Monogr. 47: 1–67. Google Scholar

36.

C. T. Collins 1963. Notes on the feeding behaviour, metabolism and weight of the Saw-whet Owl. Condor 65: 528–530. Google Scholar

37.

H. N. Coulombe 1970. Physiological and physical aspects of temperature regulation in the Burrowing Owl, Speotyto cunicularia. Comp. Biochem Physiol 35: 307–337. Google Scholar

38.

T. H. Craig & C. H. Trost . 1979. The biology and nesting density of breeding American Kestrels and Longeared Owls in the Big Lost river, south-eastern Idaho. Wilson Bull. 99: 50–61. Google Scholar

39.

J. J. Craighead & F. C. Craighead , Jr. 1956. Hawks, owls and wildlife. Stackpole Co. Harrisburg. Google Scholar

40.

Z. Czarnecki 1956. Observations on the biology of the Long-eared Owl, Asia otus (in Polish, English summary). Prace Kom. Biol. Poznaun 18: 1–42. Google Scholar

41.

S. Daan & S. Slopsema . 1978. Short-term rhythms in foraging behaviour on the Common Vole (Microtus arvalis). J. Comp. Physiol. 127: 215–227. Google Scholar

42.

S. Daan & D. Masman . 1982. Grenzen en keuzes in de voortplanting bij de Torenvalk. Limosa 55: 33–34. Google Scholar

43.

E. A. Davis 1955. Seasonal changes in the energy balance of the English Sparrow. Auk 72: 385–411. Google Scholar

44.

A. H. Davis & R. Prytherch . 1976. Field identification of Long-eared and Short-eared Owls. Br. Birds 69— 281–287. Google Scholar

45.

W. R. Dawson & C. D. Fisher . 1969. Responses to temperature by the Spotted Nightjar. Condor 71: 49–53. Google Scholar

46.

W. R. Dawson & A. F. Bennett . 1973. Roles of metabolic level and temperature regulation in the adjustment of Western Plumed Pigeons (Lophophaps ferruginea) to desert conditions. Comp. Biochem. Physiol. 44A: 249–266. Google Scholar

47.

B. Diehl & A. Myrcha . 1973. Bioenergetics of nestling Red-backed Shrikes (Lanius collurio). Condor 75: 259–264. Google Scholar

48.

V. R. Dolnik 1968. Caloric value of the daily variation of body weight in birds. Int. studies on sparrows. IBP, P. T. Sect. 2: 89–95. Google Scholar

49.

V. R. Dolnik 1969. Bioenergetics of flying birds, (in Russian). Zhurnal Obshcheï Biologii 30: 273–291. Google Scholar

50.

V. R. Dolnik 1982. Methods of time and energy budget study. In: V. R. Dolnik (ed.) Time and energy budgets in free-living birds (in Russian). Acad. Sci. USSR, Proc. Zool. Inst. 113: 1–156. Google Scholar

51.

V. R. Dolnik & V. M. Gavrilov . 1979. Bioenergetics of molt in the Chaffinch (Fringilla coelebs). Auk 96: 253–264. Google Scholar

52.

V. R. Dolnik & M. L. Yablonkevich . 1982. Growth, development and energetics of nestling Chaffinches. In: V. R. Dolnik (ed.) Population ecology of the Chaffinch (Fringilla coelebs) (in Russian). Nauka, Leningrad. Google Scholar

53.

R. H. Drent 1970. Functional aspects of incubation in the Herring Gull (Larus argentatus Pont.). Behaviour. Supplement 17: 1–132. Google Scholar

54.

R. H. Drent , B. Ebbinge & B. Weijand . 1978. Balancing the energy budgets of actic-breeding geese throughout the annual cycle: a progress report. Verh. orn. Ges. Bayern 23: 239–264. Google Scholar

55.

R. H. Drent & S. Daan . 1980. The prudent parent: energetic adjustments in avian breeding. Ardea 68: 225–252. Google Scholar

56.

G. E. Duke , J. G. Ciganek & O. A. Evanson . 1973. Food consumption and energy, water and nitrogen budgets in captive Great-horned Owls (Bubo virginianus). Comp. Biochem. Physiol. 44A: 283–292. Google Scholar

57.

G. E. Duke , A. A. Jegers , G. Loff & O. A. Evanson . 1975. Gastric digestion in some raptors. Comp. Biochem. Physiol. 50A: 649–656. Google Scholar

58.

G. E. Duke , O. A. Evanson & A. A. Jegers . 1976. Meal to pellet interval in 14 species of captive raptors. Comp. Biochem. Physiol. 53A: 1–6. Google Scholar

59.

E. H. Dunn 1975a. Caloric intake of nestling Double-crested Cormorants. Auk 92: 553–565. Google Scholar

60.

E. Dunn 1975b. Growth, body components and energy content of nestling Double-crested Cormorants. Condor 77: 431–438. Google Scholar

61.

E. H. Dunn 1980. On the variability in energy allocation of nestling birds. Auk 97: 19–27. Google Scholar

62.

A. J. van Dijk , H. D. Heinemeyer & A. C. J. Dijkstra . 1972. Gunstige stootvogelstand in Z.W. Drenthe. Het Vogeljaar 20: 87–90. Google Scholar

63.

A. J. van Dijk & B. L. J. van Os 1982. Vogels van Drenthe. Van Gorcum. Assen. Google Scholar

64.

C. M. Earhart & N. K. Johnson . 1970. Size dimorphism and food habits of north american owls. Condor 72: 251–264. Google Scholar

65.

C. Ebbinge , K. Canters & R. H. Drent . 1975. Foraging routines and estimated daily food intake in Barnacle Geese wintering in the northern Netherlands. Wildfowl 26: 5–19. Google Scholar

66.

A. J. El-Wailly 1966. Energy requirements for egg-laying and incubation in the Zebra Finch, Taeniopygia castanotis. Condor 68: 582–594. Google Scholar

67.

E. Erkinaro 1973a. Structure of the diel activity period in Tengmalm's Owl, Aegolius funereus, and the Short-eared Owl, Asio flammeus. Aquilo Ser. Zool. 14: 59–67. Google Scholar

68.

E. Erkinaro 1973b. Seasonal variation of the dimensions of pellets in Tengmalm's Owl, Aegolius funereus, and the Short-eared Owl, Asio flammeus. Aquilo Ser. Zool. 14: 84–88. Google Scholar

69.

P. L. Errington 1930. The pellet analysis method of raptor food habits study. Condor 32: 292–296. Google Scholar

70.

M. Everett 1977. A natural history of owls. Hamlyn. London. Google Scholar

71.

J. S. Fairly 1967. Food of Long-eared Owls in North-East Ireland. Br. Birds 60: 130–135. Google Scholar

72.

H. R. Fevold & J. J. Craighead . 1958. Food requirements of the Golden Eagle. Auk 75: 312–317. Google Scholar

73.

J. E. Forbes & D. W. Warner . 1974. Behaviour of a radio tagged Saw-whet Owl. Auk 91: 783–795. Google Scholar

74.

F. Frank 1953. Untersuchungen über den Zusammenbruch von Feldmausenplagen (Microtus arvalis, Pallas).Zool. Jahrb. (Syst.) 82: 95–137. Google Scholar

75.

F. Frank 1954. Beitrage zur Biologie der Feldmaus, (Microtus arvalis, Pallas). Teil I Gelege Versuche.Zool. Jahrb. (Syst.) 82: 354–404. Google Scholar

76.

V. M. Galushin 1974. Synchronous fluctuations in populations of some raptors and their prey. Ibis 116: 127–134. Google Scholar

77.

S. N. Gatehouse & B. J. Markham . 1970. Respiratory metabolism of three species of raptors. Auk 87: 738–41. Google Scholar

78.

D. M. Gates 1966. Spectral distribution of solar radiation at the earth's surface. Science 151: 523–529. Google Scholar

79.

V. M. Gavrilov 1982. Bioenergetic adaptations in birds to seasonal variations in climate. Orn. studies in USSR: 377–402. Google Scholar

80.

J. A. Gessaman 1972. Bioenergetics of the Snowy Owl (Nyctea scandiaca). Artic Alpine Research. 4: 223–238. Google Scholar

81.

J. A. Gessaman 1973. Ecological energetics of homeotherms. Monograph Series, Utah State University Press, Logan. Google Scholar

82.

J. A. Gessaman 1980. An evaluation of heart raté as an indirect measure of daily energy metabolism of the American Kestrel. Comp. Biochem. Physiol. 65A: 273–289. Google Scholar

83.

M. L. Glass 1969: Some remarks on the evening departure during winter of the Long-eared Owl, Asio otus. Dan. Ornithol. Foren. Tidsskr. 65: 171–178. Google Scholar

84.

W. Gleimich & P. Hummitzsch . 1977. Zum Brutvorkommen der Eulen im mittleren Oberelbe-Röder Gebiet. Faun. Abn. Staatl. Mus. F. Tierk. Dresden. 6: 237–262. Google Scholar

85.

D. E. Glue & G. J. Hammond . 1974. Feeding ecology of the Long-eared Owl in Britain and Ireland. Br. Birds 67: 361–367. Google Scholar

86.

D. E. Glue 1977. Breeding biology of Long-eared owls. Br. Birds 70: 318–331. Google Scholar

87.

U. N Glutz von Blotzheim , & K. Bauer . 1980. Handbuch der Vögel Mitteleuropas, Vol. 9. Akademische Verlagsgesellschaft, Wiesbaden. Google Scholar

88.

A. Gorecki 1967. Caloric values of the body in small mammals. In: K. Petrusewicz (ed.), Secundary production of terrestial ecosystems. Warszawa. Google Scholar

89.

J. Goszczýnski 1976. Estimation on daily food ration of Tyto alba under natural conditions. Polish Ecological Studies 2: 95–102. Google Scholar

90.

R. R. Graber 1962. Food and oxygen consumption in three species of owls (Strigidae). Condor 64: 473–487. Google Scholar

91.

G. Guérin 1928. La vie des chouettes. Regime et croissance de l'Effraye commune, Tyto alba alba (L.) en Vendee. P. Lechevallier, Paris. Google Scholar

92.

E. Gwinner 1966. Der zeitliche Ablauf der Handschwingenmauser des Kolkraben (Corvus corax L.) und seine funktionelle Bedeutung. Die Vogelwelt 87: 129–133. Google Scholar

93.

Y. Hagen 1965. The food, population fluctuations and ecology of the Long-eared Owl (Asio otus) in Norway. Medd. Statens Viltunders 2 (Serie Nr. 23) 1–43. Google Scholar

94.

W. J. Hamilton & F. Heppner . 1967. Radiant solar energy and the function of black homeotherm pigmentation: An hypothesis. Science 155: 196. Google Scholar

95.

E. Hartwig & G. Vauk . 1969. Zug, Rast und Nahrung der auf Helgoland durchziehenden Waldohreulen. Vogelwarte 25: 13–19. Google Scholar

96.

J. S. Hayward 1965a. The gross body composition of six geographic races of Peromyscus. Can. J. Zool. 43: 297–308. Google Scholar

97.

J. S. Hayward 1965b. Metabolic rate and its temperature-adaptive significance in six geographic races of Peromyscus. Can. J. Zool. 43: 309–324. Google Scholar

98.

C. W. Helms 1968. Food, fat, and feathers. Amer. Zool. 8: 151–167. Google Scholar

99.

D. Herzog 1930, Untersuchungen über den Grundumsatz der Vögel. Wiss. Arch. Landwirtsch. Abt. B. Arch. Tierennähr. u. Tierzucht 3: 610–626. Google Scholar

100.

A. A. Heusner & E. W. Jameson . 1981. Seasonal changes in oxygen consumption and body composition of Sceloporus occidentalis. Comp. Bioch. Physiol. 69A: 363–372. Google Scholar

101.

J. Å. Hillarp 1971. Honugglans Näringsval i Malmö och Nordanå vintern 1962/63. Med. från Skånes Orn. forening 10: 27–31. Google Scholar

102.

I. Hoogenboom , J. H. Dallinga , M. Schoenmakers & S. Daan (in prep.) Seasonal change in the daily timing of behaviour of the Common vole, Microtus arvalis. Google Scholar

103.

D. L. Houston 1976. Breeding of the White-backed and Rüppell's Griffon Vultures, Gyps africanus and G. rueppellii. Ibis 118: 14–40. Google Scholar

104.

W. E. Howard 1958. Food intake and pellet formation of a Horned Owl. Wilson Bull. 70: 145–150. Google Scholar

105.

T. R. Howell 1964. Notes on incubation and nestling temperatures and behavior of captive owls. Wilson Bull. 76: 28–36. Google Scholar

106.

A. M. Husson 1962. Het determineren van schedelresten van roofdieren in braakballen van uilen. Zool. Bijdragen, Rijksmus. Nat. Hist. Leiden 5: 1–63. Google Scholar

107.

C. Imboden 1975. A brief radio-telemetry study on Moreporks. Notornis 22: 221–230. Google Scholar

108.

W. D. Johnson & C. J. Collins . 1975. Notes on on the metabolism of the Cuckoo Owlet and Hawk Owl. Bull. South. Calif. Acad. Sci. 74: 44–45. Google Scholar

109.

J. Johnsson & C. Scharr . 1970. Hornugglans (Asio otus) foda i Lund vintern 1969/70. Vår Fågelvärld 29: 303–304. Google Scholar

110.

A. de. Jong 1976. The influence of simulated solar radiation on the metabolic rate of White-crowned Sparrows. Condor 78: 174–179. Google Scholar

111.

M. P. Kahl 1962. Bioenergetics of growth in nestling Wood Storks. Condor 64: 169–183. Google Scholar

112.

M. P. Kahl 1964. Food ecology of the Wood Stork (Mycteria americana) in Florida. Ecol. Monogr. 34: 97–117. Google Scholar

113.

H. W. Kale 1965. Ecology and bioenergetics of the Longbilled Marsh Wren in Georgia salt marshes. Nuttall Ornithological Club Publication, no: 5. Cambridge, Massachusetts. Google Scholar

114.

H. Källander 1977. Food of the Long-eared Owl (Asio otus) in Sweden. Ornis Fennica 54: 79–84. Google Scholar

115.

V. V. Kashkin 1961. Heat exchange in birds' eggs on incubation. Biophysica 6: 97–107. Google Scholar

116.

S. C. Kendeigh 1949. Effect of temperature and season on the energy resources of the English Sparrow. Auk 66: 113–127. Google Scholar

117.

S. C. Kendeigh 1963. Thermodynamics of incubation in the House Wren, Troglodytes aedon. Proc. XIIIth Intern. Ornithol. Congr. (Ithaca): 884–904. Google Scholar

118.

S. C. Kendeigh 1970. Energy requirements for existence in relation to size of bird. Condor 72: 60–65. Google Scholar

119.

S. C. Kendeigh 1972. Energy control of size limits in birds. Am. Nat. 106: 79–88. Google Scholar

120.

S. C. Kendeigh 1973. Monthly variations in the energy budget of the House Sparrow throughout the year. In: S. C. Kendeigh & J. Pinowski (eds.). Productivity, Population Dynamics and Systematics of Granivorous Birds: 17–44. Polish Scientific Publishers, Warszawa. Google Scholar

121.

S. C. Kendeigh , V. R. Dolnik & V. M. Gavrilov . 1977. Avian Energetics. In: J. Pinowski and S. C. Kendeigh , (eds.). Granivorous birds in ecosystems, Cambridge Univ. Press. Google Scholar

122.

J. Kielanowski 1976. Energy cost of protein deposition. In: D. J. A. Cole , K. N. Boorman , P. J. Buttery , D. Lewis , R. J. Neale & H. Swan (eds.). Protein Metabolism and Nutrition. Butterworths, London. Google Scholar

123.

J. R. King 1973. Energetics of reproduction in birds. In: D. S. Farner (ed.). Breeding biology of birds. Nat. Ac. of Sciences. Washington DC. Google Scholar

124.

J. R. King 1974. Seasonal allocation of time and energy resources in birds. In: R. A. Paynter , Jr. (ed.). Avian energetics. Nuttall Ornithological Club Publication, no:15. Cambridge, Massachusetts. Google Scholar

125.

J. R. King 1980. Energetics of avian moult. Proc. XVIIth Int. Ornithol. Congr. (Berlin): 312–317. Google Scholar

126.

J. K. Kirkwood 1979. The partition of food energy for existence in the Kestrel, Falco tinnunculus, and the Barn Owl, Tyto alba. Comp. Biochem. Physiol. 63A: 495–498. Google Scholar

127.

S. Klaus , H. Mikkola & J. Wiesner . 1975. Aktivität und Ernährung des Rauhfuss-kauzes, Aegolius funereus (L.), während der Fortplanzungsperiode. Zool. Jb. 102: 485–507. Google Scholar

128.

N. Kleiber 1961. The fire of life. John Wiley, New York. Google Scholar

129.

D. von Knorre . 1973. Jagdgebiet und täglicher Nahrungsbedarf der Schleiereule.Zool. Jahrb. (Syst.) 100: 301–320. Google Scholar

130.

J. R. Koplin , M. W. Collopy , A. R. Bammann & H. Levenson . 1980. Energetics of two wintering raptors. Auk 97: 795–806. Google Scholar

131.

D. Lack 1954. The natural regulation of animal numbers. Clarendon Press, Oxford. Google Scholar

132.

D. Lack 1966. Population studies of birds. Clarendon Press, Oxford. Google Scholar

133.

D. Lack 1968. Ecological adaptations for breeding in birds. Methuen & Co, London. Google Scholar

134.

R. C. Lasiewski 1969. Physiological responses to heat stress in the Poorwill. Am. J. Physiol. 217: 1504–1509. Google Scholar

135.

R. C. Lasiewski & W. R. Dawson . 1964. Physiological responses to temperature in the Common Nighthawk. Condor 66: 477–490. Google Scholar

136.

R. C. Lasiewski & W. R. Dawson . 1967. A re-examination of the relation between standard metabolic rate and body weight in birds. Condor 69: 13–23. Google Scholar

137.

R. C. Lasiewski , W. R. Dawson & G. A. Bartholomew . 1970. Temperature regulation in the Little Papuan Frogmouth, Podargus ocellatus. Condor 72: 332–338. Google Scholar

138.

R. Levins 1968. Evolution in changing environments. Mon. in Pop. Biol. 2. Princeton University Press, Princeton. Google Scholar

139.

V. Lewin 1963. Reproduction and development of young in a population of California Quail. Condor 65: 249–278. Google Scholar

140.

J. D. Ligon 1968. The biology of the Elf Owl, Micrathene whitneyi. Miscellaneous Publications, Museum of Zoology, University of Michigan 136: 1–70. Google Scholar

141.

D. J. Ligon 1969. Some aspects of temperature relations in small owls. Auk 86: 458–472. Google Scholar

142.

S. Lustick 1969. Bird energetics: Effects of artificial radiation. Science 163: 387–390. Google Scholar

143.

C. D. Marti 1973. Food consumption and pellet formation rates in four owl species. Wilson Bull. 85: 178–181. Google Scholar

144.

C. D. Marti 1976. A review of prey selection by the Longeared Owl. Condor 78: 331–336. Google Scholar

145.

R. März 1965. Zug, Überwinterung und Brutverhalten der Waldohreule, Asio otus. Beitr. Vogelk. 10: 338–348. Google Scholar

146.

T. McMahon 1973. Size and shape in biology. Science 179: 1201–1204. Google Scholar

147.

T. Mebs 1964. Zur Biologie und Populationsdynamik des Mäusebussards. J. Orn. 105: 247–306. Google Scholar

148.

T. Mebs 1971. Eulen und Käuze. Franckh'sche Verlagshandlung, Stuttgart. Google Scholar

149.

J. A. L. Mertens 1972. A model for the prediction of heat loss of Great Tit broods. In: Inst. f. Ecol. Res., progress report, Royal Netherlands Academy of Arts and Sciences: 89–90. Google Scholar

150.

J. A. L. Mertens 1977. Egg composition and the energy expenditure of avian embryos. Verh. Kon. Ned. Akad. Wet. (Amsterdam), Afd. Natuurkunde 69: 6–7. Google Scholar

151.

R. R. Moldenhauer & P. G. Taylor . 1973. Energy intake by Hydropenic Chipping Sparrow (Spizella passerina passerina) maintained on different diets. Condor 75: 439–445. Google Scholar

152.

J. A. Mosher & P. F. Matray . 1974. Size dimorphism: a factor in energy savings for Broad-winged Hawks. Auk 91: 325–341. Google Scholar

153.

R. Moss 1973. The digestion and intake of winter foods by wild Ptarmigan in Alaska. Condor 75: 293—300. Google Scholar

154.

R. Moss & J. A. Parkinson , 1972. The digestion of heather (Calluna vulgaris) by Red Grouse (Lagopos lagopus scoticus). Brit. J. Nutr. 27: 285–298. Google Scholar

155.

R. K. Murton & N. J. Westwood . 1977. Avian breeding cycles. Clarendon Press, Oxford. Google Scholar

156.

A. Myrcha & W. Walkowa . 1968. Changes in the caloric value of body during the postnatal development of white mice. Acta Theriologica 13: 391–400. Google Scholar

157.

A. Myrcha & J. Pinowski . 1970. Weights, body composition and caloric value of post-juvenal molting European Tree Sparrows. Institute of Ecology, Polish Academy. Google Scholar

158.

A. Myrcha , J. Pinowski & T. Tomek . 1973. Energy balance of nestlings of Tree Sparrows, Passer m. montanus and House Sparrows, Passer domesticus. In: S. C. Kendeigh & J. Pinowski . (eds.). Productivity, population dynamics and systematics of granivorous birds. Polish Scient. Publ., Warszawa. Google Scholar

159.

I. Newton 1966. The moult of the Bullfinch, Pyrrhula pyrrhula. Ibis 108: 41–67. Google Scholar

160.

I. Newton 1967. Feather growth and moult in some captive finches. Bird Study 14: 10–24. Google Scholar

161.

I. Newton 1979. Population ecology of raptors. T. & A. D. Poyser, Berkhamsted. Google Scholar

162.

M. M. Nice 1957. Nesting success in altricial birds. Auk 74: 305–321. Google Scholar

163.

T. H. Nicholls & D. W. Warner . 1972. Barred Owl habitat use as determined by radiotelemetry. J. Wildl. Manage. 36: 213–224. Google Scholar

164.

I. N. Nilsson 1978. Hunting in flight by Tawny Owls (Strix aluco). Ibis 120: 528–531. Google Scholar

165.

I. N. Nilsson 1981. Ecological aspects on birds of prey, especially Long-eared Owl and Tawny Owl. Ph. D. dissertation University of Lund. Google Scholar

166.

R. A. Norberg 1981. Temporary weight decrease in breeding birds may result in more fledged young. Am. Nat. 118: 838–850. Google Scholar

167.

R. B. Owen Jr 1969. Heart rate, a measure of metabolism in Blue-winged Teal. Comp. Biochem. Physiol. Vol. 31: 431–436. Google Scholar

168.

R. B. Owen Jr 1970. The bioenergetics of captive Bluewinged Teal under controlled and outdoor conditions. Condor 72: 153–163. Google Scholar

169.

G. Page & D. F. Whitrace . 1975. Raptor predation on wintering shorebirds. Condor 77: 73–83. Google Scholar

170.

C. J. Pennycuick 1972. Animal flight. Edward Arnold, London. Google Scholar

171.

C. J. Pennycuick 1975. Mechanics of flight. In: D. S. Farner et al. (eds.). Avian Biology, Vol. 5. Academic Press, New York. Google Scholar

172.

R. Piechocki 1968. Über die Grossgefieder-Mauser einer gekäfigten Waldohreule. Beitr. Vogelk. 13: 455–460. Google Scholar

173.

F. A. Pitelka , P. Q. Tomich & G. W. Treichel . 1955. Ecological relations of jaegers and owls as lemming predators near Barrow, Alaska. Ecol. Monogr. 25: 85–117. Google Scholar

174.

E. L. Poole 1938. Weights and wing areas in North American Birds. Auk 55: 511–517. Google Scholar

175.

J. Raczynski & A. L. Ruprecht . 1974. The effect of digestion on the osteological composition of owl pellets. Acta Ornith. 14: 25–38. Google Scholar

176.

Raptor Group RUG/RIJP. 1982. Timing of vole hunting in aerial predators. Mammal Rev. 12: 169–181. Google Scholar

177.

R. E. Ricklefs 1967. Relative growth, body constituents and energy content of nestling Barn Swallows and Red-winged Blackbirds. Auk 84: 560–570. Google Scholar

178.

R. E. Ricklefs 1967a. A graphical method of fitting equations to growth curves. Ecology 48: 978–983. Google Scholar

179.

R. E. Ricklefs 1968. Patterns of growth in birds. Ibis 110: 419–451. Google Scholar

180.

R. E. Ricklefs 1974. Energetics of reproduction in birds. In: R. A. Paynter , Jr. (ed.). Avian energetics. Nuttall Ornithological Club Publication, no: 15. Cambridge Massachusetts. Google Scholar

181.

R. E. Ricklefs & S. C. White . 1981. Growth and energetics of chicks of the Sooty Tern (Sterna fuscata) and Common Terns (S. hirundo). Auk 98: 361–378. Google Scholar

182.

D. Rockenbauch 1971. Die Ernährung südwestdeutscher Wanderfalken (Falo peregrinus). J. Orn. 112: 43–60. Google Scholar

183.

A. L. Romanoff & A. J. Romanoff . 1949. The Avian Egg. Wiley. New York. Google Scholar

184.

M. Rubner 1883: Ueber den Einfluss der Körpergrosse auf Stoff- und Kraftwechsel. Zeitschrift für Biologie 19: 535–562. Google Scholar

185.

A. Rijnsdorp , S. Daan & C. Dijkstra . 1981. Hunting in the Kestrel, Falco tinnunculus, and the adaptive significance of daily habits. Oecologia 50: 391–406, Google Scholar

186.

T. von Schantz & I. N. Nilsson . 1981. The reversed size dimorphism in birds of prey: a new hypothesis. Oikos 36: 129–132. Google Scholar

187.

R. L. Schartz & J. L. Zimmerman . 1971. The time and energy budget of the male dickcissel (Spiza americana). Condor 73: 65–76. Google Scholar

188.

P. F. Scholander , V. Walters , R. Hock & L. Irving . 1950a. Body insulation of some arctic and tropical mammals and birds. Biol. Bull. 99: 225–236. Google Scholar

189.

P. F. Scholander , R. Hock , V. Walters , F. Johnson & L. Irving . 1950b. Heat regulation in some arctic and tropical mammals and birds. Biol. Bull. 99: 237–258. Google Scholar

190.

P. F. Scholander , R. Hock , V. Walters & L. Irving . 1950c. Adaptation to cold in arctic and tropical mammals and birds in relation to body temperature, insulation and basal metabolic rate. Biol. Bull. 99: 259–271. Google Scholar

191.

E. E. Selkurt 1962. Physiology. Little, Brown and Company. Boston. Google Scholar

192.

D. W. F. Shannon & W. O. Brown . 1969. Losses of energy and nitrogen on drying poultry excreta. Poultr. Sci. 48: 41–43. Google Scholar

193.

C. J. Shapiro & W. W. Weathers . 1981. Metabolic and behavioural responses of American Kestrels to food deprivation. Comp. Biochem. Physiol. 68A: 111–114. Google Scholar

194.

C. Smeenk 1972. Ökologische Vergleiche zwischen Walkauz (Strix aluco) und Waldohreule (Asia otus). Ardea 60: 1–71. Google Scholar

195.

G. R. South 1966. Food of Long-eared Owls in South Lancashire. Br. Birds 59: 493–497. Google Scholar

196.

H. N. Southern 1954. Tawny Owls and their prey. Ibis 96: 384–410. Google Scholar

197.

H. N. Southern 1970. The natural control of a population of Tawny Owls (Strix aluco). J. Zool. (London) 162: 197–285. Google Scholar

198.

A. Stiefel & R. Stiefel . 1970. Nahrungsökologische Untersuchungen an Waldohreulenschlafplätzen in städtischer und landwirtschaftlich genutzten Gebieten. Apus 2: 148–152. Google Scholar

199.

E. Stresemann & V. Stresemann . 1966. Die Mauser der Vögel. J. Ornithol. 107 (Sonderheft) Striges: 357–375. Google Scholar

200.

M. Sylvén 1982. Reproduction and survival in Common Buzzards (Buteo buteo) illustrated by the seasonal allocation of energy expenses. Ph. D. dissertation. University of Lund. Google Scholar

201.

W. R. Tarboton 1978. Hunting and the energy budget of the Black-shouldered Kite. Condor 80: 88–91. Google Scholar

202.

J. M. Thiollay 1967. Ecologie d'une population de rapacees diurnes en Lorraine. Terre Vie 1: 116–183. Google Scholar

203.

N. Tinbergen 1933. Die Ernährungsökologische Beziehungen zwischen Asio otus L. und ihren Beutetieren, ins besonder den Microtusarten. Ecol. Mon. 3: 443–492. Google Scholar

204.

L. Tinbergen 1940. Beobachtungen über die Arbeitsteilung des Turmfalken (Falco tinnunculus L.) während der Fortpflanzungszeit. Ardea 29: 63–98. Google Scholar

205.

V. A. Tucker 1972, Metabolism during flight in the Laughing Gull, Larus atricilla. Am. J. Physiol. 222: 237–245. Google Scholar

206.

V. A. Tucker 1974. Energetics of natural avian flight. In: R. A. Paynter Jr. (ed.). Avian energetics: 298–333. Nutall Ornithological Club Publication, No. 15, Cambridge, Massachusetts. Google Scholar

207.

F. J. Turček 1966. On plumage quantity in birds. Ekologia Polska, Ser. A 14: 617–634. Google Scholar

208.

J. C. Turner & L. McClanahan Jr . 1981. Physiogenesis of endothermy and its relation to growth in the Great-horned Owl, Bubo virginianus. Comp. Biochem. Physiol. 68A: 167–173. Google Scholar

209.

O. Uttendörfer 1939. Die Ernährung der deutschen Raubvögel und Eulen, und ihr Bedeutung in den Heimischen Natur. J. Neumann-Neudamm, Berline. Google Scholar

210.

O. Uttendörfer 1952. Neue Ergebnisse über die Ernährung der Greifvögel und Eulen. Eugen Ulmer, Stuttgart. Google Scholar

211.

R. E. Verheyen 1956. La mue de la queue chez les Hiboux et les chouettes (Striges). Gerfaut 46: 121–125. Google Scholar

212.

C. M. Vleck 1981. Energetic cost of incubation in the Zebra Finch. Condor 83: 229–237. Google Scholar

213.

C. M. Vleck , D. F. Hoyt & D. Vleck . 1979. Metabolism of avian embryos: patterns in altricial and precocial birds. Physiol. Zool. 52: 363–377. Google Scholar

214.

L. G. Wallick & G. W. Barrett . 1975. Bioenergetics and prey selection of captive Barn Owls. Condor 77: 139–141. Google Scholar

215.

G. E. Walsberg 1980. Energy expenditure in free-living birds: patterns and diversity. Proc. XVIIth Int. Ornithol. Congr. (Berlin): 300–305. Google Scholar

216.

J. S. Wakeley 1978. Activity budgets, energy expenditures, and energy intakes of nestling Ferruginous Hawks. Auk 95: 667–676. Google Scholar

217.

W. W. Weathers 1980. Seasonal and geographic variation in avian standard metabolic rate. Proc. XVIIth. Int. Ornithol. Congr. (Berlin): 283–286. Google Scholar

218.

J. Weiner 1970. Energy requirements of House Sparrow in southern Poland. Intern. Studies of Sparrows, 4: 39–41. Google Scholar

219.

V. Wendland 1957. Aufzeichnungen über Brutbiologie und Verhalten der Waldohreule (Asio otus). J. Ornith. 98: 241–261. Google Scholar

220.

G. C. West 1960. Seasonal variation in the energy balance of the Tree Sparrow in relation to migration. Auk 77: 306–329. Google Scholar

221.

G. C. West 1968. Bioenergetics of captive Willow Ptarmigan under natural conditions. Ecology 49: 1035–1045. Google Scholar

222.

K. Westerterp 1973. The energy budget of the nestling Starling (Sturnus vulgaris): a field study. Ardea 61: 137–158. Google Scholar

223.

K. Westerterp 1977. How rats economize: energy loss in starvation. Physiol. Zool. 50: 331–362. Google Scholar

224.

J. van. Winkel 1964. Ransuilen in de Limburgse Kempen. De Wielewaal 3: 41–45, 65–72, 106–109. Google Scholar

225.

R. D. Wooler & G. S. Triggs . 1968. Food of the Longeared Owl in Inverness-shire. Bird Study 15: 164–166. Google Scholar

226.

A. van Wijngaarden . 1957. De periodiciteit in populatiemaxima van de Veldmuis, Microtus arvalis, in Nederland (1806–1956). Vakblad voor Biologen 37: 1–8. Google Scholar

227.

J. H. Zar 1968. Standard metabolism comparisons between orders of birds. Condor 70: 278. Google Scholar

228.

F. Ziesemer 1973. Siedlungsdichte und Brutbiologie von Waldohreule, Asio otus, und Turmfalk, Falco tinnunculus, nach Probeflächenuntersuchungen. Corax 4: 79–92. Google Scholar

229.

J. L. Zimmerman 1965. Digestive efficiency and premigratory obesity in the Dickcissel. Auk 82: 278–279. Google Scholar