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Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	The food of the Afrotropical nightjars
Auteurs :	H. D. Jackson, Auteur
Type de document :	Article
Dans :	Ostrich (71(3-4) SEP 2000)
Article en page(s) :	408-415
Langues:	Anglais
Résumé :	A synthesis of 722 published and unpublished records of nightjar stomach contents from Afrotropical specimens was undertaken. Coleoptera were found in 84.6% of the stomachs, often in substantial numbers, beetles providing these birds with their staple diet. Lepidoptera occurred in 34.9% of the stomachs and were often present in large numbers; moths ore an extremely important port of the nightjar diet in the Afrotropics, especially during winter. Orthoptera. Hemiptera and Dictyoptera, although present in 24.7, 16.3 and 11.5% of the stomachs, respectively, usually occurred in rather small numbers. Hymenoptera and Isoptera were often present in great numbers, yet were found in only 10.4 and 10.1% of the stomachs, respectively, so a limited number of individual nightjars had found emerging swarms of alate ants or termites in season. Neuroptera. Diptera, Odonota and Dermaptera were found in a few stomachs (2.4, 1.2, 0.6 and 0.3%, respectively) but these insects clearly ploy a very small port in the diet of nightjars in the Afrotropics. Similarities and differences in diet between some closely related nightjar species ore discussed. Grit was found in 16 stomachs only, so deliberate ingestion of stones to aid digestion is regarded as extremely unlikely among nightjars in the Afrotropics. The contents of a full stomach may account for as much as 20-25% of the body moss of a nightjar.

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