Posted by: woodcreeper | October 25, 2007 @ 5:56 am

Birds on the move


Birds were on the move across Florida last night, with all radars showing some level of migration. Here’s the radar from sunset last night through 5:00am 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 was moderate to heavy across the state last night, with a sizable influx of birds coming in across the northern border. Over Tampa the birds appeared to be heading N–>SSE along the coast, while the birds over Miami were clearly moving NW–>SE. This should mean a good influx of birds into southeast coastal sites this morning, and the possibility of some new birds into the inland sites as well, given the slight westerly push. A moderate push of birds was also evident leaving from the southern Everglades into the lower Keys, which could result in some localized densities depending on precipitation patterns down there this morning.

Good Birding!


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  1. We were excited to wake up to NW winds and cooler temps and flight calls before sunrise (GCTH, SWTH, various warblers) and had a small rush of birds dropping in after sunrise. This was short-lived as the birds semed to dissipate, probably to find big fruiting ficus (our best one has been pretty picked over the last few days). We ended up banding 45 new birds, with a nice diversity of species. Swainson’s and gray-cheeked thrushes, chuck-will’s widow, Tennessee, hooded warblers among the most interesting. There were a lot of recaptures from the last several days still around, and in good condition, too. I wonder if the winds down here shifted too late in the night for birds already here to leave. I’m surprised we didn’t catch more birds after looking at the radar loop from last night; it looked like a LOT of birds were on the move. Still some mysteries between what radar shows and what we get on the ground.


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