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Quoting Shouty McShoutsalot <desolatechair@gmail.com>:
> If you will indulge me here's a further question - is migration learned
> behavior or evolutionary instinct - nurture or nature?
* certainly both pertain in different and within the same species -
Geese and Cranes are known to learn their migratory routes from their
parents, and on the other hand juvenile Arctic shorebirds migrate to
traditional destinations after the adults have left the breeding
grounds. In Leopard Frogs I have a similar (as yet untested)
hypothesis which I call "turn SSW on the 23rd of July."
With the irruptive Owls it's probably an instinctive tendency to drift
south, rather than north, when food is scarce, and then to retrace
their route in the spring.
fred.
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Frederick W. Schueler & Aleta Karstad
Bishops Mills Natural History Centre - http://pinicola.ca/bmnhc.htm
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
Daily Paintings - http://karstaddailypaintings.blogspot.com/
South Nation Basin Art & Science Book
http://pinicola.ca/books/SNR_book.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
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