Sentence examples for birds are needed from inspiring English sources

More data from known-aged birds are needed to answer the question about age at first breeding, but we can say on average, red-tailed hawks start to breed at 3 years old.

Detailed quantitative data on how, and which, effects of the grow-out lighting influence the immune responses in broilers and how these affect the numbers of salmonellas in organs of birds are needed to test this hypothesis.

Therefore, extensive surveillance in wild birds is needed to better understand the ecology and evolution of AIV in South America.

Others commented on the timing and said "this is exactly the time those bird boxes are needed" and "we need to get replacements up as birds will start nesting now".

Further studies where bird consumers are followed before, during, and after the bird hunting season are needed to establish the association between consumption of birds and blood lead concentrations as well as peak concentrations.

Additional studies in mammals and birds employing similar methods are needed to determine whether the propagation of higher frequency activity during apparent up-states is unique to birds.

Because the chemical composition of preen oil changes with the season as well as across species and ages of birds [55],[56], future studies are needed to determine the common uropygial component that could promote interaction with AIVs in all aquatic bird species.

With most bird species, both parents are needed to bring up the young, so most birds stay together after mating, at least until after the breeding season.

e. Modern animal facilities that can hold contemporary birds with contemporary management methods are needed.

Presumably fewer birds are surviving over winter than are needed to maintain current numbers".

However; more studies are needed, especially in birds and other wild, outbred species [ 22- 25].