Posted by: badbirdz2 | April 10, 2007 @ 7:25 am

Huge migration last night!

Wow! Last night was surely the big one; representing the highest densities of nocturnal migrants this spring. I’m sorry the post is going up so late, but I was at the Mets home opener last night and didn’t get home until 6:50am this morning. Anyway, here’s the radar from sunset last night through sunrise this morning. Birds are seen departing from Cuba, the Keys, South and Central Florida. Again, the line of precipitation stretched across the state seems to partition the areas of migration to the south, from the areas of non-migration (or greatly reduced) to the north. For this reason it’s probably a best bet to do some birding along this boundary. With the sheer numbers of birds entering south Florida (both west AND east) birding conditions at all locations should be good. If you’re toying with the idea of calling in sick, I think today’s a good choice.

Good Birding

Frames are every 1/2 hour for reflectivity and velocity, and 1 hour for the regional composite
Base Reflectivity image from Key WestBase Velocity image from Key West Base Reflectivity image from Miami Base Velocity image from Miami Regional Base Reflectivity for the Southeast


  1. David,

    Where can I find more info on how to read the radar maps? I get it that the dots are birds, but what do the colors and the measurements on the right side mean? Great job with your sites.

  2. Patrick

    I’ve just added a Birds and Radar primer:



  3. Re: migration Monday night. After checking DLP Radar Services yesterday afternoon, I decided to try a primitive ground truth exercise to correlate radar and a couple of migrant traps. I stopped by Cape Florida first, where there were only a few residual migrants and evidence of many having moved on. Next, I went to the Annex with high hopes that were not to be realized. There were fewer migrants there than in Cape Florida, despite fruiting ficus trees. A few wintering birds (Yellow-breasted Chat, House Wren, etc.) are still loitering about.

    I’ll leave the explanation to others as to which weather components were missing necessary to drop birds into these 2 places.

    The “primer” is great!

  4. I wonder if they kept going and didn’t bother to land in the migrant traps?
    This morning (Tues the 10th) out in the Everlades to the W of the Homestead Airport, I heard more migrants at sunrise than any day yet this year. Savannah Sparrows, several flocks of warblers, and FOS Bobolinks (half-dozen or so). Lots of swallows on the move Monday morning the 9th: Tree, Barn, couple of Caves.

  5. Wed. April 11th
    Marco Island, Mackle Park, 1 Indigo Bunting, 3 Palm Warblers, 1 Prairie
    Warbler, and 2 Catbirds. South Beach parking and Gene Sarizen Park south Marco Island, 2 male Hooded, 2 Prairie, 1 Ovenbird, 3 Palms, 2 N. Parula Warblers and 2 Catbirds.
    Big Cypress Bend Boardwalk east of Naples on 41, 4 N. Parula’s, 2 Prairie’s, 1 Worm-eating, 1 Prothonotary Warbler, 4 Bluegray Gnatcatcher, 1 male Redstart. 4 White-eyed Vireo’s, 1 Red-eyed Vireo, 3 Catbirds, and 6 Greatcrested Flycatchers
    Not a bad day for some migrants.

    Kenneth Williams


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