Yet another reason to love birds: after a certain point in late winter, they say, To hell with the temperature, I'm getting on with it! On Wed, Mar 5, 2014 at 9:01 AM, Marie P. Read m...@cornell.edu wrote: Things are looking up. Mr. Cardinal just fed Mrs. Cardinal in a tree near my feeders.
I assume it's hours of daylight rather than temperature that triggers behaviors. From: bounce-112921516-3493...@list.cornell.edu [mailto:bounce-112921516-3493...@list.cornell.edu] On Behalf Of Robin Cisne Sent: Wednesday, March 05, 2014 9:33 AM To: Marie P. Read Cc: CAYUGABIRDS-L Subject: Re:
I just located this 2012 review paper on the topic: Photoperiodic Control of Seasonality in Birds http://jbr.sagepub.com/content/16/4/365.abstract. In case you can't see that link from where you are, here's a brief excerpt from the abstract. This review examines how birds use the annual cycle in