Name: Alex L
Is there a main reason why hawks migrate? If yes,
what is the reason?
When is the usual breeding season of hawks? How is
the breed season related to their migration?
Why do thesehawks migrate in large groups of
Are there any variations among hawks due to the
difference in environment?
As with many questions we get on this service, this is far too much to
answer here, especially because "hawks" might refer to a number of species
in North America with very different behavior and range. But for a start:
1. The principle reason for migration of birds is availability of food;
there are other factors as well, depending on species, range, etc.
2. Once again, depends on species and home range. In general larger birds
nest as early as possible in the season to allow time for young to mature
before winter or migration
3. Birds take advantage of favorable weather for migration, in the case of
hawks and other soaring birds combinations of weather and geography that
produce favorable winds will lead many birds to the same place at the same
time. I don't think there is any social significance to kettles, just
You might start with The Birder's Handbook, commonly available, or any
general book on bird ecology, for more info on migration; for some species
accounts check the Stokes Guides to Behavior of Birds, 3 volumes, also
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Update: June 2012