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1 July 2004 Food of the Willow Warbler Phylloscopus trochilus Nestlings: Differences Related to the Age of Nestlings and Sex of Feeding Parents
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Abstract

The study was conducted in the Lake Karaś reserve (N Poland), where the density of Willow Warblers in osier and birch thickets reached 28.7–33.3 p/10 ha. Collar rings were used to collect the food brought to the nestlings. 487 food samples were collected from 26 nests, comprising 2573 food items. 167 of the samples were from females (652 individual food items), 95 from males (616 food items). The nestlings were fed mainly on Arthropoda (94.6%) and Mollusca (5.4%). The dominant food items were Diptera (29.8%), Homoptera (28.7%), Ephemeroptera (10.5%), Araneida (7.6%) and Trichoptera (6.5%). The composition of the dominant food items and the average mass of food deliveries changed markedly with nestling growth. The types of food brought by each sex also varied significantly. Males brought heavier portions of food consisting of larger numbers of lighter prey. However, the composition of these portions was not as diverse as those brought by females. This may be related to differences between males and females in their respective territories and foraging techniques.

REFERENCES

1.

B. E. Arvidson 1984. The relation between male song territory and the foraging areas of male and female Willow Warblers Phylloscopus trochilus. Var Fagelvärld 63: 107–112. Google Scholar

2.

Y. V. Averin , I. M. Ganya 1970. [Birds of Moldavia]. Vol. I. Kishiniev. Google Scholar

3.

J. Bańbura , P. Perret , J. Blondel , A. Sauvages , M.-J. Galan , M. M. Lambrechts 2001. Sex differences in parental care in a Corsican Blue Tit Parus caeruleus population. Ardea 89: 517–526. Google Scholar

4.

G. Bjoernstad , J. T. Lifjeld 1996. Male parental care promotes early fledging in an open-nester, the Willow Warbler Phylloscopus trochilus. Ibis 138: 229–235. Google Scholar

5.

Z. Bogucki 1964. [Studies of the food content of small songbirds during the breeding season]. Ekol. pol., ser B. 10: 100–105. Google Scholar

6.

S. I. Bozhko 1958. [Materials on warblers breeding and feeding in a park in suburban Leningrad]. Vestnik Leningr. gos. Univ. 15: 81–92. Google Scholar

7.

P. A. Brodman , H.-U. Reyer 1999. Nestling provisioning in Water Pipits Anthus spinoletta: do parents go for specific nutrients or profitable prey? Oecologia 120: 506–514. Google Scholar

8.

R. G. B. Brown 1963. The behaviour of the Willow Warbler in continuous daylight. Ibis 105: 63–75. Google Scholar

9.

S. Cramp (ed.). 1992. The Birds of Western Palearctic. Vol. VII. Oxford Univ. Press. Google Scholar

10.

N. N. Danilov , V. N. Ryzhanovskiy , V. K. Ryabitsev 1984. [Birds of Yamal]. Moskva. Google Scholar

11.

M. Dornbusch 1981. Die Ernährung einiger Kleinvogelarten in Kiefernjungbe-stockungen. Beitr. Vogelkd. 27: 73–99. Google Scholar

12.

A. D. Evans , K. W. Smith , D. L. Buckingham , J. Evans 1997. Seasonal variation in breeding performance and nestling diet of Cirl Buntings Emberiza cirlus in England. Bird Study 44: 66–79. Google Scholar

13.

L. Kleinschmidt 2001. [The breeding ecology of the Whinchat Saxicola rubetra (Linnaeus 1758) in the Warminsko-Mazurski Region]. Ph. D. thesis, University of Gdańsk. Google Scholar

14.

H. N. Kluijver 1933. Bijdrage tot de biologie en de ecologie van der spreeuw (Sturnus vulgaris L.) gedurende zijn voortplantingtijd — Versl. Meded. Plantewziektenk. Wageningen, 69: 1–145. Google Scholar

15.

R. Krupa 2001. [The breeding biology of the Bluethroat Luscinia svecica cyanecula (Wolf 1810) in the Karaś Lake reserve]. Ph. D. thesis, University of Gdańsk. Google Scholar

16.

R. Krupa , L. Kleinschmidt , M. Krupa 2000. [Avifauna, teriofauna, herpetofauna and lepidopterofauna in the Karaś Lake nature reserve]. Department of Environmental Protection and Agriculture of the Warminsko-Mazurski Region, Olsztyn. Google Scholar

17.

P. Kuusisto 1941. Studien über die Ökologie und tagesrhytmik von Philloscopus trochilus acredula (L) mit besonderer Berücksichtigung der Brutbiologie. Acta Zool. Fennica 31: 1–120. Google Scholar

18.

R. Mackowicz 1970. Biology of the Woodlark Lullula arborea L. 1758 (Aves) in the Rzepin Forest (Western Poland). Acta zool. cracov. 15: 61–160. Google Scholar

19.

A. S. Malchevskiy 1959. [The breeding biology of songbirds]. Leningrad. Google Scholar

20.

R. Markowski , K. Żółkoś , J. Bloch 2000. [The current flora and plants on the land of the Karaś Lake nature reserve]. Department of Environmental Protection and Agriculture of the Warminsko-Mazurski Region, Olsztyn. Google Scholar

21.

J. Moreno 1987. Parental care in the Wheatear Oenanthe oenanthe: effects of nestling age and brood size. Ornis Scand. 18: 291–301. Google Scholar

22.

L. Naef-Daenzer , B. Naef-Daenzer , R. G. Nager 2000. Prey selection and foraging performance of breeding Great Tits Parus major in relation to food availability. J. Avian Biol. 31: 206–214. Google Scholar

23.

R. Neergaard , B. A. Arvidson 1995. Polygyny in the Willow Warbler Phylloscopus trochilus in Swedish Lapland. Ibis 137: 64–69. Google Scholar

24.

K. G. K. Nyström 1991. On sex-specific foraging in the Willow Warbler, Phylloscopus trochilus. Can. J. Zool. 69: 462–470. Google Scholar

25.

I. V. Prokofieva 1973. [The food of the warblers in the forests of the Leningrad region]. Biol. Nauki 4: 22–29. Google Scholar

26.

C. M. Rauter , P. A. Brodmann , H.-U. Reyer 2000. Provisioning behaviour in relation to food availability and nestling food demand in the Water Pipit Anthus spinoletta. Ardea 88: 81–90. Google Scholar

27.

V. K. Ryabitsev , S. V. Shutov , V. N. Ol'shvang 1980. [Analysis of concrete relations of Willow Warbler and Eversmann's Warbler (with comments on the specifity of ecosystems)]. Ekologiya 11: 83–92. Google Scholar

28.

S. Rytkonen , K. Koivulla , M. Orell 1996. Pattern of per-brood and per-offspring provisioning efforts in the Willow Tit Parus montanus. J. Avian Biol. 27: 21–30. Google Scholar

29.

M. Schönfeld 1982. Der Fitislaubsänger Phylloscopus trochilus. Die Neue Brehm-Bücherei. Wittenberg. Google Scholar

30.

K. Schultze-Hagen , H. Flinks , A. Dyrcz 1989. Brutzeitliche Beutewahl beim Seggenrohrsänger Acrocephalus paludicola. J. Ornithol. 130: 251–255. Google Scholar

31.

D. Sejberg , S. Bensch , D. Hasselquist 2000. Nestling provisioning in polygynous Great Reed Warblers Acrocephalus arundinaceus: do males bring larger prey to compensate for fewer nest visits? Behav. Ecol. Sociobiol. 47: 213–219. Google Scholar

32.

H. Temrin , A. Brodin , O. Akerström , S. Stenius 1997. Parental investment in monogamous pairs of Wood Warblers Phylloscopus sibilatrix. J. Ornithol. 138: 93–101. Google Scholar

33.

J. Tiainen 1983. Ecological energetics of nestling growth Willow Warbler Phylloscopus trochilus. Ann. Zool. Fennici 20: 13–24. Google Scholar

34.

J. H. Zar 1996. Biostatistical analysis. Prentice-Hall, Englewood Cliffs. New Jersey. Google Scholar
Krupa Małgorzata "Food of the Willow Warbler Phylloscopus trochilus Nestlings: Differences Related to the Age of Nestlings and Sex of Feeding Parents," Acta Ornithologica 39(1), 45-51, (1 July 2004). https://doi.org/10.3161/068.039.0110
Received: 1 February 2004; Accepted: 1 April 2004; Published: 1 July 2004
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