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Natural History, Birds, Savi's warbler (Locustella luscinioides)

Vintage engraving of a Savi's warbler (Locustella luscinioides) , from Francis Orpen Morris, A History of British Birds. The Savi's warbler (Locustella luscinioides) is a species of Old World warbler in the grass warbler genus Locustella. It breeds in southern Europe and temperate western Asia.

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Garden Warbler, Sylvia borin, illustration of bird sitting on oak brach with grub in beak

Garden Warbler, Sylvia borin, illustration of bird sitting on oak brach with grub in beak.

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72196666, Animals, Birds, Color Image, Colour Image, Feeding, Food And Drink, Garden Warbler, Grub, Illustration, Illustration Technique, No People, Old World Warblers, One Animal, Passeriformes, Passerine Bird, Passerines, Sylvia Borin, Sylviidae, Vertical, Warbler, White Background

Great reed-warbler (Acrocephalus arundinaceus)

Great reed-warbler (Acrocephalus arundinaceus), rejecting a cuckoo egg. The cuckoo has evolved to lay an egg similar to the host's but the host has evolved to create markings on its own eggs to distinguish them. And in turn the cuckoo may evolve to mimic that behaviour. The sequence has fascinated biologists for many years. Nagano Prefecture, Japan