Sandy, I, too, have heard titmice and cardinals. I believe such behavior is 
more tied to hormonal responses brought on by increased daylength but am no 

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-------- Original message --------From: Sandy Wold <> 
Date: 2/13/18  9:56 PM  (GMT-05:00) To: Upstate NY Birding digest 
<> Subject: [cayugabirds-l] Bird Signs of Earlier 
Maybe this is obvious to everyone on this list with people reporting the call 
of a cardinal or "raven with nest material" in February.  But I also have been 
noticing sounds of spring (cardinal, titmouse, Carolina Wren, ...), crows 
checking out tree tops and pairing, crows bombing raptors,... since February 
1st (maybe even second or third week of January?).  I meant to write dates and 
temps in my notebook this year, but didn't.
It seems like all of this is happening a month or two early, am I wrong? Are 
there any scientific studies that show what triggers the timing of these 
territorial behaviors? Could it be a certain number of days above freezing?  I 
know the media talks about the growing seasons lengthening and things blooming 
earlier,... but I haven't seen anything written on bird nesting behavior.  Just 
curious, thanks!Sandy---
Climate Change Action: 30-day Ithaca VEGAN CHALLENGE (pledge for Earth Day 
2018)No-blame, no-shame support here:
Less meat = Less heat, 4 min. video
Sandy WoldAuthor/Originator of Cayuga Basin Bioregion Map 
(available at Wegmans (near ATM), Autumn Leaves, Cornell Plantations, and 
Ithaca Visitor's Bureau)

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