The phrase "aggregation of birds" is correct and usable in written English.
It can be used in contexts discussing groups or collections of birds, particularly in scientific or ecological discussions.
Example: "The aggregation of birds migrating south for the winter creates a stunning spectacle in the sky."
Alternatives: "flock of birds" or "group of birds".
This newly developed trajectory generation logic provides a stable swarming logic which resembles a large aggregation of birds.
Upon arrival in Qinghai Lake or Mongolia, transmission to other birds would have been facilitated by the high densities and aggregation of birds, and the relatively cold temperatures that favor persistence of the virus in the environment (Brown et al., 2007; Rohani et al., 2009).
More concretely, bird watchers may see a new bird, which reminds them of a prior bird that they have seen.
Scientists have long been intrigued by the dynamics of such large aggregations of birds, particularly starling flocks -- known as "murmurations".
They may briefly join mixed-species flocks, but do not travel with such flocks; however, Blue-gray Tanagers often join mixed-species aggregations of birds that are attracted to fruiting trees.
Central place foraging, coupled with huge aggregations of birds at the breeding colonies, likely exerts predation pressure on local prey stocks, and potentially amplifies intra-specific competition at the colonies.
The high prevalence seen in ducks in October may be a result of the close contact, and possibility of virus transmission between individuals, following the dense aggregation of these birds along their migratory route towards wintering areas.
Little wonder, then, that the Indians have one of the best hitting aggregations in the league.
Dense aggregations of the bird-nest sponge are also known to occur at depths of 750 1300 m on the slope of the Porcupine Seabight in the NE Atlantic Ocean [27] and off Morocco [28].
The fingers on one hand, the toes on one foot, a minuscule aggregation when compared with shoals of fish or flocks of birds or, indeed, tribes of humans.
In this sense, experimental work is needed to test the effectiveness of smaller, less predictable AFS located near breeding territories to enhance adult survival while avoiding large aggregations of non-adult birds in their surrounding.
