You should be quite good in February at both Green Cay and Wakodahatchee...it's in the heart of the winter season, so good selection of birds down this way - if you're lucky, there'll be a cold front in the days preceeding your visit, as whenever we get a cold front down here we see more birds arrive from farther north (cold front being a relative term - since we don't get 'cold' like you folks up north!).
Warbler/perching-wise, we've been seeing many palms, common yellowthroats, yellow-rumpeds, and the occasional pines and black and whites. As well as blue grey gnatcatchers, white-eyed vireo, eastern phoebe, purple martins, various swallows, painted buntings, cowbirds, grackles, blue jays, cardinals, brown thrasher, red-winged blackbird. Of course, we're chock-full-of waders too this time of year, plenty of raptors, and I've been seeing good woodpecker variety the past few weeks (downys, pileateds, and red-bellieds...and usually we start seeing northern flickers in Feb).
Feel free to ask any additional questions. And look for some of us locals on the weekend too!