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Posted by Alex Harper on 14:28:26 02/26/11
In Reply to: Re: Corkscrew Swamp Sanctuary: reprise? posted by Paul-the-Other
Keep in mind that Blue-headed Vireos, which are probably common at Corkscrew, have a similar song to Red-eyed Vireo.
Listing aside, I think it is important to monitor unusual sightings to understand the natural history of a species further or possible environmental implications. The Red-eyed Vireo is not likely under any current environmental or climatological stress, even if one were to be in North America in the winter. I can't say the same for the Ivory Gulls that have shown up along the Atlantic coast, inland Georgia, and on the Pacific as far south as Southern California. The increasing frequency of their southern forays should be as much of a red flag to the environmental community as any other organism decreasing in population in the polar regions.
Lastly, and less importantly, there are applications for these records in the scientific literature, such as the Florida Field Naturalist.
The only thing ordaining where they should be is their dependence on enough lipids and fat-soluble vitamins to sustain their sheer numbers in the winter time, which seems to be the energy dense Amazon.
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