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(vertebrate zoology)
A family of large birds in the order Passeriformes having stout, long beaks; includes the crows, jays, and magpies.



a family of birds of the order Passeriformes. The birds are of medium and large dimensions (up to 65 cm in length) with powerful beaks and claws. They have nostrils covered with trichoid feathers (adult rooks are an exception) and straight tails, which are either rounded or stepped. Some members of Corvidae (magpies, tropical magpies, and jays) have very long tails. The plumage is thick and in many species has a metallic luster. There are more than 100 species. They are distributed widely and found everywhere but Antarctica, New Zealand, and certain ocean islands. Their haunts are varied and include forests, steppes, deserts, mountains, and populated areas.

Usually members of Corvidae nest in separate pairs and less frequently in colonies. They are monogamous. They build their nests in trees or bushes, on rocks, and on the roofs of buildings. They lay three to eight speckled eggs once a year in early spring. Most species are roosting and migratory birds. They are omnivorous. Some members of Corvidae are useful as exterminators of murine rodents and harmful insects; others are harmful and damage crops (corn and sunflowers, for example) or destroy the eggs and fledglings of other birds. In the USSR there are 17 species, including the Alpine chough, raven, crow, jackdaw, rook, chough, Siberian jay, magpie, and jay.


Ptitsy Sovetskogo Soiuza, vol. 5. Edited by G. P. Dement’ev and N. A. Gladkov. Moscow, 1954.


References in periodicals archive ?
Mark Watson, habitat specialist for New Mexico Department of Game and Fish, said the loss of pinyon nuts during the 10-year drought has affected wildlife species including bears and turkeys as well as corvids.
And because seed-caching corvids and rodents often space caches widely (Stapanian & Smith, 1978, 1984; Clarkson et al.
A total of 6,681 corvids were tested for WNV during 2003-2009; none were positive (Table 1).
In pinons the seeds are adapted for dispersal by birds, corvids such as jays and nutcrackers, which harvest the seeds from the trees.
Prior to Corvid, Bruell held numerous high-level engineering positions within Wellfleet/Bay Networks.
After a glimpse of humans' long history of interacting with and sometimes appreciating crow intelligence (Amazing Feats and Deep Connections), the second overview chapter (Bird Brains No Longer) summarizes a few formal studies of corvid cognition and then orients the reader to the neurobiology of vertebrates and birds in particular, relating neural processes closely to the examples of cognition.
Oral swabs and feather pulp are preferred target samples for diagnosis of WNV infection in corvids (19,20).
Corvid is based on over two decades of developing expert systems tools and working with companies on the capabilities and features needed to build and field expert systems that solve real-world problems.
Fecal samples and oropharyngeal swabs were collected from live birds that had been caught primarily for ringing purposes (8) and from dead wildfowl and corvids provided by licensed shooters.
Corvid survey techniques and the relationship between corvid relative abundance and nest predation.
Through a series of experiments, researchers have shown that rooks, birds belonging to the corvid (or crow) family, are able to solve complex problems using tools and can easily master the same technique demonstrated in Aesop's fable.
Other corvid species, such as the carrion crow (Corvus corone) or the jackdaw (C.