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The starlings are generally a highly social family. Most species associate in flocks of varying sizes throughout the year. Murmuration is the flocking of starlings, including the swarm behaviour of their large flight formations. [8] These flocks may include other species of starlings and sometimes species from other families.
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.
Flock (birds) Red-billed queleas form enormous flocks—sometimes tens of thousands strong. A flock is a gathering of individual birds to forage or travel collectively. [1] Avian flocks are typically associated with migration. Flocking also offers foraging benefits and protection from predators, although flocking can have costs for individual ...
A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species that join each other and move together while foraging. [1] These are different from feeding aggregations, which are congregations of several species of bird at ...
The great blue heron (Ardea herodias) is a large wading bird in the heron family Ardeidae, common near the shores of open water and in wetlands over most of North and Central America, as well as far northwestern South America, the Caribbean and the Galápagos Islands. It is occasionally found in the Azores and is a rare vagrant to Europe.
In some other countries, flocks are sometimes force moulted rather than being slaughtered to re-invigorate egg-laying. This involves complete withdrawal of food (and sometimes water) for 7–14 days [ 84 ] or sufficiently long to cause a body weight loss of 25 to 35%, [ 85 ] or up to 28 days under experimental conditions. [ 86 ]
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The barn swallow (Hirundo rustica) is the most widespread species of swallow in the world, occurring on all continents, with vagrants reported even in Antarctica. [2] [3] It appears to have the largest natural distribution of any of the world's passerines, ranging over 251 million square kilometres globally.