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1 December 2002 Differences Between the Spring and Autumn Migration of the Red-Backed Shrike Lanius collurio: Record from the Eilat Stopover (Israel)
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Abstract

Migratory Red-backed Shrikes were mist-netted during the spring and autumn migrations (n = 1031 individuals) from 1984 to 2001 in Eilat (Israel). In a similar pattern of trapping, more than four times as many shrikes were caught during autumn than in spring. Males migrated significantly earlier than females in spring but not during the autumn migration, which suggests that in males there is a stronger drive to reach their breeding territories early. In both seasons and between both sexes we did not find any significant relations between the body measurements of individuals and the time of passage. The spring migration was much shorter time than the autumn migration. This was expressed by the minimum stopover duration, as well as by the time when Red-backed Shrike occurred in Eilat. There are significant differences between wing chord length, body mass and fat scores between seasons. In autumn males had longer wings, and both sexes were heavier and in better condition than in spring. The data suggest that the differences are an adaptation to their having to cross the Sahara Desert. The birds spend a statistically significantly shorter period of time at the Eilat stopover site in spring than in autumn (median 1 ± 1.5 days vs 5 ± 6.5 days). In autumn, recaptured birds were 6.3% heavier than during the first capture. The change in body mass was significantly correlated to the duration of the stopover period. The results suggest that migration over desert is energetically costly and that Eilat is a very important stopover site for migrating Red-backed Shrikes.

REFERENCES

1.

R. V. Alatalo, L. Gustafsson, A. Lundberg 1984. Why do young passerine birds have shorter wings than older birds? Ibis 126: 410–415. Google Scholar

2.

F. Baierlein 1995. Recent prospects on trans-Saharan migration of songbirds. Ibis 134, Suppl.: 41–46. Google Scholar

3.

H. Biebach 1995. Stopover of migrating flying across the Mediterranean Sea and the Sahara. Isr. J. Zool. 41: 387–392. Google Scholar

4.

H. Biebach , M. Dallmann , W. Schuy , K.-H. Siebenrock 1983. Die Herbstzugrichtung von Neuntötern (Lanius collurio) auf Karpathos (Griechenland). J. Ornithol. 124: 251–257. Google Scholar

5.

B. Bruderer , H. Bruderer 1994. Numbers of Redbacked Shrikes Lanius collurio in different habitats of South Africa. Bull. Brit. Ornithol. Club 114: 192–202. Google Scholar

6.

B. Bruderer , F. Liechti 1995. Variation in density and height distribution of nocturnal migration in the south of Israel. Isr. J. Zoool. 41:477–487. Google Scholar

7.

R. Drost 1934. Welchen Weg nehmen die auf Helgoland durchziehenden Neuntöter Lanius collurio collurio. Die Vogelzug 5: 190–191. Google Scholar

8.

C. H. Fry , J. S. Ash , I. J. Ferguson-Lees 1970. Spring weights of some Palearctic migrants at Lake Chad. Ibis 112: 58–82. Google Scholar

9.

R. Frumkin , B. Pinshow , S. Kleinhaus 1995. A review of bird migration over Israel. J. Ornithol. 136: 127–147. Google Scholar

10.

T. Harris , K. Franklin 2000. Shrikes and Bush-shrikes. Christopher Helm, London. Google Scholar

11.

M. Herremans 1997. Habitat segregation of male and female Red-backed Shrikes Lanius collurio and Lesser Grey Shrikes Lanius minor in the Kalahari basin, Botswana. J. Avian Biol. 28: 240–248. Google Scholar

12.

H. Jakober, W. Stauber 1989. Beeinflussen und Alter dei Ortstreue des Neuntöters (Lanius collurio)? Vogelwarte 35: 32–36. Google Scholar

13.

L. Jenni , R. Winkler 1994. Moult and Ageing of European Passerines. Academic Press, London. Google Scholar

14.

A. Kaiser 1999. Stopover strategies in birds: a review of methods for estimating stopover length. Bird Study 46, Suppl.: 299–308. Google Scholar

15.

R. E. Moreau 1969. Comparative weights of some trans-Saharian migrants at intermediate points. Ibis 111: 621–624. Google Scholar

16.

J. H. Morgan, H. Shirihai 1997. Passerines and passerine migration in Eilat. Int. Birdw. Cent. Eilat Tech. Publ. Vol 6. Google Scholar

17.

G. Nikolaus 1990. Shrikes, Laniidae, feeding on Marsh Warblers Acrocephalus palustris during migration. Scopus 14: 26–28. Google Scholar

18.

M. Norusis 1986. SPSS PC + . Advanced statistics. SPSS Inc. Google Scholar

19.

D. J. Pearson 1971. Weights of some Palearctic migrants in Uganda. Ibis 113: 173–184. Google Scholar

20.

T. Ruf 2000. Mass-dependent mass loss: how to get the null hypothesis wrong. Oikos 90: 413–416. Google Scholar

21.

U. Safriel 1968. Bird migration at Elat, Israel. Ibis 110: 283–320. Google Scholar

22.

U. N. Safriel , D. Lavee 1988. Weight changes of cross-desert migrants at an oasis. Do energetic considerations alone determine the length of stopover? Oecologia 76: 611–619. Google Scholar

23.

M. Schaub , R. Pradel , L. Jenni , J.-D. Lebreton 2001. Migrating birds stop over longer than usually thought: an improved capture-recapture analysis. Ecology 82: 852–859. Google Scholar

24.

H. Shirihai 1996. The birds of Israel. Academic Press, London. Google Scholar

25.

F. Spina , A. Massi , A. Montemaggiori 1994. Back from Africa: Who's running ahead? Aspects of differential migration of sex and age classes in Palearctic-African spring migrants. Ostrich 65: 137–150. Google Scholar

26.

W. J. Sutherland 1996. Predicting the consequences of habitat loss for migratory populations. Proc. R. Soc. London B Biol. Sci. 263:1325–1327. Google Scholar

27.

P. Tryjanowski, T. Sparks 2001. Is the detection of the first arrival date of migrating birds influenced by population size? A case study of the red-backed shrike Lanius collurio. Int. J. Biometeorol.: 217–219. Google Scholar

28.

D. van Nieuwenhuyse , E. Nollet , A. Evans 1999. The ecology and conservation of the Red-backed Shrike Lanius collurio breeding in Europe. Aves 36: 179–192. Google Scholar

29.

M. S. Webster , P. P. Marra , S. M. Haig , S. Bensch , R. T. Holmes 2002. Links between worlds: unravelling migratory connectivity. Trends Ecol. Evol. 17: 76–83. Google Scholar

30.

R. Yosef 1998. Migration of Red-backed (Lanius collurio) Masked (L. nubicus) and Woodchat shrikes (L. senator) at Eilat Israel. IBCE Tech. Publ. 7: 5–8. Google Scholar
Piotr Tryjanowski and Reuven Yosef "Differences Between the Spring and Autumn Migration of the Red-Backed Shrike Lanius collurio: Record from the Eilat Stopover (Israel)," Acta Ornithologica 37(2), 85-90, (1 December 2002). https://doi.org/10.3161/068.037.0204
Received: 1 October 2002; Accepted: 1 November 2002; Published: 1 December 2002
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