Both the gravel pits and Lake Casa Blanca International State Park are home to North America Heron and Egret species. The Lower Rio Grande Valley has long been a popular destination for birders, but it is important to note that the Laredo area is not just an extension of the Valley. Indeed, Laredo is emerging as a birding destination with significant bird resources, which set it apart from the Valley and you will want to be among the birders who are discovering them. The bird nests in tree cavities, mainly in palm trees. In late evening, small flocks of the birds can be heard making a shrill, noisy clatter as they come to roost.
Experts disagree on the origin of the green parakeet in Texas.
Some feel the birds come from released captive birds while other believe the birds moved into Texas from Nuevo Leon and Tamaulipas as habitat in their northern range was cleared. Either way, they appear to be here to stay and their numbers are gradually increasing.