Posted by: woodcreeper | October 23, 2007 @ 6:23 am

Early push of birds over Florida


Did you blink? If you said yes, then you might have missed it. Here’s the radar from sunset last night through 5:30am this morning.

Frames are every 1/2 hour for reflectivity and velocity, and every hour for the regional composite. Click on the thumbnail to view the full-sized animation.

Base Reflectivity image from Key West, FL Base Velocity image from Key West, FL
Base Reflectivity image from Miami, FL Base Velocity image from Miami, FL Composite base reflectivity for the Southeastern USA

Migration over Florida was limited to the first few hours after sunset, after which birds apparently decided not to fight the southerly winds. The regional composite gives some indication of this, with a small pulse of activity right after sunset, decreasing by 11:00pm; but it’s also worth noting that most of the signal was not birds as the velocity images for north and central Florida (not pictured) indicated movement from S–>N as well as the small amount of N–>S migration. Miami radar indicated moderate pulses of birds moving after sunset, and the Key West radar shows birds had left peninsular Florida for the Keys as well. Birds did not appear to have migrated into the Florida Straits for Cuba last night.

Good Birding! 🙂

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  1. It’s because catbirds are too lazy to fly all night.
    We banded 42 new birds today at Cape Florida, with catbirds and black-throated blues predominating. Most of the birds around yesterday left last night. The numbers banded today were the highest in 10 days. I think David is right; they are moving but they’re not wearing themselves out with long all-night flights.


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