I was fortunate enough to see the male Cerulean Warbler in Prospect Park
this morning and equally fortunate to be standing near Karen Ohearn when
she said, "I've got a Yellow-throated Warbler!"
Both birds were near the southern terminus of the Lullwater adjacent to the
winter bird feeding station. A checklist with ID quality photos can be seen
here.

http://ebird.org/ebird/view/checklist?subID=S29356904

For those on the list that watch radar and wind maps, last night offered a
true 'teachable moment." The surface winds were from the NE and SE
overnight. There was no visible lift off north of Virginia on radar maps as
of 10:30pm and no measurable drop out this morning at 5:30am.

I use this radar link:
http://radar.weather.gov/Conus/northeast_loop.php

And this wind map:
http://earth.nullschool.net/#current/wind/isobaric/1000hPa/orthographic=-76.16,41.82,2048/loc=-73.010,40.993

Given what was visible (to me) I decided to not be out first thing. As
tweets from Prospect Park starting coming in it was clear birds moved last
night. So curiosity prompted some conversation. What Shane Blodgett was
kind enough to point out was on the wind map I use one can search by
elevation. By clicking the "earth" icon in the lower left corner of the
wind map you can change the height for the wind readings. I have more
research to do, but by changing the height to 850 (this is a pressure
reading, but correlates with the altitudes birds migrate at) I could
immediately see the mid-level winds were from the SW overnight and provided
an explanation for the influx of birds in the park and along the coast this
morning.

If other list members have more/other sites they find useful in this regard
please share. The technology and information accessible at our fingertips
is exciting!

Good birding!

Sean Sime
Brooklyn, NY

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