The phrase "availability of birds" is correct and usable in written English.
It can be used when discussing the presence or accessibility of bird species in a particular area or context.
Example: "The availability of birds in this region makes it a popular destination for birdwatchers."
Alternatives: "presence of birds" or "accessibility of birds".
House finch densities were positively related to the density of people providing food for birds prior to the spread of mycoplasmal conjunctivitis, suggesting that the availability of bird seed can limit the size of finch populations.
The cost and availability of bird feed for the two turtle doves pushed their prices up by 25 percent (still less than the 78.6 percent rise in 2010) to $125, but the three French hens remained the same, at $150.
During times of limited fruit availability, groups of birds tend to leave their home range.
Today Nokia announced the availability of Angry Birds on the Ovi Store for Symbian.
The icy weather, which reduced the availability of the bird's small mammal prey, was the latest in a series of extreme weather events going back to 2009 which had hit barn owl populations, he said.
Both local rainfall and NAO have been related by multivariate analyses to breeding population size in Doñana: the former is a better estimator of habitat availability for birds migrating into Doñana, while the latter may affect the probability that birds wintering in Africa will breed closer to their wintering grounds.
The aim was to determine the potential of these species to act as indicators of food resource availability for birds in managed semi-natural habitats on farmland and thus as a measure of the effectiveness of specific management practices under agri-environment schemes (AES).
Use of agricultural insecticides, such as synthetic neonicotinoids, are among the chief concerns raised, given that pesticides can dramatically reduce the availability of insects the birds rely on for food.
The alien status and taxonomic isolation of Eucalyptus globulus in the region, together with specific features of its leaves and bark, may explain the low suitability of eucalypt plantations, by limiting the presence of phytophagous insects and thus the availability of prey for birds.
An important conservation consideration is that any measures that reduce the availability of discards for birds on the Patagonian shelf will be beneficial.
