Between December and May, 276 different species of migrating birds flock to the lagoons, rivers and swamps of the massive Crooked Tree Wildlife Sanctuary,Belize. The absolute best time to spot birds here is between April and May.
Crooked Tree Wildlife Sanctuary (Belize). 'Belize is for the birds. Nowhere is that statement truer than at Crooked Tree. The wetlands attract hundreds of bird species (276 to be exact), including dozens of migrants who stop on their way north or south. Birding is best during the drier months (February to May), when the lagoon dries up and the birds congregate around the remaining puddles.' http://www.lonelyplanet.com/belize/northern-belize/crooked-tree-wildlife-sanctuary