Cuckoo and hosts, nonhosts (IMAGE)
Caption
Researchers report that brood parasites, like this common cuckoo, top, have larger eyes than the birds they target – beyond the difference expected as a result of their larger body size. Common cuckoos will parasitize the nests of European robins, bottom left, but not those of European bee-eaters, bottom right.
Credit
Photos by Tomas Grim
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Photos may be used only with stories about the research described in this release. Credit required.
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Original content