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Group of black-capped chickadees feeding at a bird feeder. Bird species living in a flock may capture prey, likely injured, from an unsuccessful bird within its flock. [2] This behavior is known as the beater effect and is one of the benefits of birds foraging in a flock with other birds. [2]
Helpers are predominantly found aiding closely related broods over nonrelated broods. [12] Additional species such as Neolamprologus pulcher have shown that kin selection is a dominant driving force for cooperative breeding. [12] Group augmentation presents a second hypothesis towards the evolution of cooperative breeding.
Solitary life in animals is considered to be the ancestral state of living; and group living has thus evolved independently in many species of animals. [2] Therefore, species that form groups through social interaction will result in a group of individuals that gain an evolutionary advantage, such as increased protection against predators ...
A herd is a social group of certain animals of the same species, either wild or domestic. The form of collective animal behavior associated with this is called herding. These animals are known as gregarious animals. The term herd is generally applied to mammals, and most particularly to the grazing ungulates that classically display this behaviour.
Many kinds of birds are known to congregate in groups of varying size; a congregation of nesting birds is called a breeding colony. A group of birds congregating for rest is called a communal roost. Approximately 13% of all bird species nest colonially. [110] Nesting colonies are very common among seabirds on cliffs and islands.
As informal taxonomic ranks, species group, species aggregate, macrospecies, and superspecies are also in use. Two or more taxa that were once considered conspecific (of the same species) may later be subdivided into infraspecific taxa (taxa within a species, such as bacterial strains or plant varieties ), which may be a complex ranking but it ...
Black-headed gulls, bar-tailed godwits and sanderlings foraging on a beach. 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]
The Bird Island Nature Reserve in Lambert's Bay, Western Cape, South Africa. A bird colony is a large congregation of individuals of one or more species of bird that nest or roost in proximity at a particular location. Many kinds of birds are known to congregate in groups of varying size; a congregation of nesting birds is called a breeding colony.