Sentence examples for birds migration from inspiring English sources

As an employee of the Biological Survey of the U.S. Department of Agriculture, Wetmore was particularly interested in avian anatomy, osteology, fossil birds, migration, and taxonomy.

It also influences the birds' migration patterns, Ainley and Ballard report this week in Polar Biology.

We found that the initial spread of the H9N2 virus from south to north coincides with birds' migration pattern.

This may be explained by different tick activity during spring and autumn migration and/or by different tick population densities along the birds' migration routes in to Norway (spring) compared to in their Norwegian breeding grounds (autumn).

The river serves as an important part of the continental bird migration route, providing habitat for millions of migrating birds such as sandhill and whooping cranes.

Bird Migration in the Garden State," interactive exhibition.

Unfortunately, this is true of long sections on bird migration.

The lights will glow every night -- cloud cover, helicopter traffic and bird migration permitting.

But few detailed studies have been conducted on just how difficult bird migration can be.

In June and July in northern Florida there is not much bird migration going on".

Among nonbirders, that same border is better known for illegal human migration than for bird migration.