Sentences with phrase «eurasian cuckoos»

While the Eurasian cuckoos are threatening to invade North America, American cowbirds are increasing their presence in Eurasia.

Along with Mark Hauber, professor of neurobiology and behavior at City University of New York, and their co-authors, Dinets has discovered that two species of Eurasian cuckoos are on the verge of invading North America, and one of them may already be breeding here.

Dinets added that local fish and wildlife authorities, hunters and other people spending a lot of time outdoors should be taught to recognize Eurasian cuckoos in order to mitigate the effects when the cuckoos arrive.

Not exact matches

Many Eurasian birds have evolved defenses against cuckoos, but cowbirds are less picky about choosing their hosts, and might threaten other species that are not parasitized by cuckoos and have no defenses.

While previous studies have focused on Batesian mimicry in the common cuckoo and Eurasian sparrowhawk, this is the first time that the plumage patterns of cuckoos have been analysed using digital image analysis techniques.

While scientists have intensively researched links in plumage patterns between the common cuckoo and Eurasian sparrowhawk, the new research shows that this type of impersonation of a more dangerous animal — called «Batesian mimicry» — may be far more widespread in cuckoos.