I've been out of town so this may be too late. The easiest spot to get to is the city park which has nesting Great and Snowy Egrets, flycatchers, warblers, tanagers, etc. Also, the Charco del Ingenio can be reached by taxi for only three dollars or so. Ask the driver to pick you up again in a few hours. It's a ravine with a dam, a lake and some wetland. Waders, ducks, sparrows, wrens and more.