...There are a great number of different kinds of cuckoos, and most of them select a special host to associate with, and are never found except with that species...
Edward Saunders 「Wild Bees, Wasps and Ants」
...In the short-tongued bees, with the exception of Halictus and Sphecodes, the cuckoos are quite unlike their hosts both in form and colour...
Edward Saunders 「Wild Bees, Wasps and Ants」
...On the other hand, the cuckoos of the social species resemble them so closely in structure as well as appearance that it is more necessary to search for points of difference than of similarity...
Edward Saunders 「Wild Bees, Wasps and Ants」
...The underground species are more subject to the attacks of cuckoos than the carder bees...
Edward Saunders 「Wild Bees, Wasps and Ants」
...One peculiarityof the feet is that the bird can reverse one toe, so that it can havethree toes in front and one behind, like most birds, or two infront and two behind, like Parrots and Cuckoos...
John Albert Leach 「An Australian Bird Book」
...The Bronze Cuckoos are very similar...
John Albert Leach 「An Australian Bird Book」
...So whilewe may say that the Cuckoos are much alike in habitsone must not accept generalized statements too literally...
Frank M. Chapman 「What Bird is That?」
...Stuart Baker's papers on the Oology of the Indian Cuckoos in VolumeXVII of the Journal of the Bombay Natural History Society...
Douglas Dewar 「Birds of the Indian Hills」
...The third of the cuckoos which enlivens the hot weather in theplains is the Indian cuckoo (Cuculus micropterus)...
Douglas Dewar 「A Bird Calendar for Northern India」
...Scarcely less vociferous than the cuckoos are the owls...
Douglas Dewar 「A Bird Calendar for Northern India」
...Theparrots, which climb after a fashion, have it;but so do the cuckoos, which do not climb, someof which, like our road-runner, or ground cuckooof the West, are strictly terrestrial...
Fannie Hardy Eckstorm 「The Woodpeckers」
...Red haws have been recorded as nest trees of horned owls,yellow-billed cuckoos, cardinals, and fox squirrels...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...The woodpeckers,the jays, the cuckoos, the pewees, the warblers,and other wood birds show only a low degreeof variability in song, feeding, and nesting habits...
John Burroughs 「Ways of Nature」
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