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Wurdemann’s heron, is an interesting cross species...based on this article.
"a pair of Great Blue Herons at Wakodahatchee Wetlands, Delray Beach, Florida. It’s clearly a mated pair, but the female (sexed by behavior) has more white on the head and fore neck, paler legs and bill, white head plumes, paler rust color on the upper legs and shoulder, and probably a few other things
Great Blue and “Great White” Herons before here, and noted that in the Florida Keys most birds are white, some are dark, and there is a continuum of variation in between, so it’s not a surprise to see a bird that looks about 75% dark, 25% white. Delray Beach is about 60 miles north of the expected range of “Great White” herons, however, and this pale individual suggests that the zone of intergradation may be more extensive than I thought. It’s worth looking carefully at other nesting Great Blue Herons in southern Florida to see how far the apparent “Great White” influence extends. She's a beauty for sure, amazing how hard the male works fetching sticks, and nesting material. Of course he's no dummy, as he's expecting something in return, and from my observations last friday, this boy is also getting his groove on as well...
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