Autumn and spring migration of the Reed Warbler Acrocephalus scirpaceus in Egypt—some interesting aspects and questions

Four ringing stations of the SE European Bird Migration Network in Egypt (at the coasts of the Mediterranean and Red seas, in the Nile Valley, and at the northern edge of the Sahara) provided data on birds resting in adequate habitats. At three stations more birds per day were caught in spring than...

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Bibliographic Details
Published in:Ostrich 2011-04, Vol.82 (1), p.49-56
Main Authors: Ożarowska, Agnieszka, Stępniewska, Katarzyna, Ibrahim, Wed Abdel Latif
Format: Article
Language:English
Subjects:
Acrocephalus
Acrocephalus scirpaceus
autumn
Bird migration
birds
coasts
flight
habitats
migratory behavior
spring
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Summary:Four ringing stations of the SE European Bird Migration Network in Egypt (at the coasts of the Mediterranean and Red seas, in the Nile Valley, and at the northern edge of the Sahara) provided data on birds resting in adequate habitats. At three stations more birds per day were caught in spring than in autumn. Deviating geographical conditions induced high capturing numbers at the Red Sea coast, particularly in autumn. Differences between spring and autumn may indicate loop migration and/or seasonally differing flight or resting strategies. Wing-length distribution may indicate passage of different populations through Egypt. In autumn, birds with low fat scores were caught in high proportion after the crossing of the Mediterranean Sea, while average fat scores increased in birds approaching the edge of the Sahara.
ISSN:1727-947X
0030-6525
1727-947X
DOI:10.2989/00306525.2010.541502