UV-BIRDERS Archives

March 2011, Week 5

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From:
Blake Allison <[log in to unmask]>
Reply To:
Blake Allison <[log in to unmask]>
Date:
Thu, 31 Mar 2011 12:01:32 -0700
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After a couple of relatively quiet days this week - Mon. through Wed. - of maybe 65+/- individuals seen early in the morning with less than 20 feeding steadily throughout the day, the numbers are back up into the 120 range today, maybe in anticipation of the coming storm. After a peak count on Monday, the 21st of nearly 300, the numbers declined (low 100s) through Friday of that week but spiked again Saturday morning, the 26th to the low 200s. Attached are some photos from the 21st.

A couple of interesting behaviors suggesting how their numbers might benefit them. Last week I saw a flock of about 40 chase off a Coopers or sharp-shinned hawk. Might this swarming be a defensive technique? Also have noticed that when they come in large numbers to the feeders other users whether avian or squirrel are kept away. Again numbers being used as a benefit by securing and protecting a food source? That's counter-intuitive to the idea that traveling in such large numbers would be a negative by increasing competition within the flock for resources. Comments?

Blake Allison

Lyme, NH 03768-3322 



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