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  2. Common raven - Wikipedia

    en.wikipedia.org/wiki/Common_raven

    Subadult ravens roost together at night, but usually forage alone during the day. However, when one discovers a large carcass guarded by a pair of adult ravens, the unmated raven will return to the roost and communicate the find. The following day, a flock of unmated ravens will fly to the carcass and chase off the adults.

  3. Why are flocks of black birds in my yard this winter? Here’s ...

    www.aol.com/news/why-flocks-black-birds-yard...

    In fall and winter, local birds will flock together, while many in the north will move down south to spend the cold months, according to the Carolina Bird Club. When spring comes, adult American ...

  4. Swarm behaviour - Wikipedia

    en.wikipedia.org/wiki/Swarm_behaviour

    A flock of auklets exhibit swarm behaviour. Swarm behaviour, or swarming, is a collective behaviour exhibited by entities, particularly animals, of similar size which aggregate together, perhaps milling about the same spot or perhaps moving en masse or migrating in some direction. It is a highly interdisciplinary topic. [1]

  5. Preening - Wikipedia

    en.wikipedia.org/wiki/Preening

    When preening, a bird (such as this red lory) draws individual feathers through its beak, realigning and re-interlocking the barbules.. Preening is a maintenance behaviour found in birds that involves the use of the beak to position feathers, interlock feather barbules that have become separated, clean plumage, and keep ectoparasites in check.

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  7. Common raven physiology - Wikipedia

    en.wikipedia.org/wiki/Common_raven_physiology

    The common raven (Corvus corax), also known as the northern raven, is a large, all-black passerine bird. Found across the Northern Hemisphere , it is the most widely distributed of all corvids . Their Northern range encompasses Arctic and temperate regions of Eurasia and North America, and they reach as far South as Northern Africa and Central ...

  8. Corvus - Wikipedia

    en.wikipedia.org/wiki/Corvus

    Hooded crow (Corvus cornix) in flight Jungle crow (Corvus macrorhynchos) scavenging on a dead shark at a beach in Kumamoto, Japan. Medium-large species are ascribed to the genus, ranging from 34 cm (13 in) of some small Mexican species to 60–70 cm (24–28 in) of the large common raven and thick-billed raven, which together with the lyrebird represent the larger passerines.

  9. Communal roosting - Wikipedia

    en.wikipedia.org/wiki/Communal_roosting

    Galahs gathering for communal roost, Karratha (). Communal roosting is an animal behavior where a group of individuals, typically of the same species, congregate in an area for a few hours based on an external signal and will return to the same site with the reappearance of the signal.