Texas Game Rules say this
Parks and Wildlife Outdoor Annual 2014-2015
"The only birds not protected by any state or federal law are
European starlings, English sparrows, feral rock doves(common pigeon - Columba livia), and
Eurasian collared-doves; these species may be killed at any time, their nests or eggs destroyed, and their feathers may be possessed. Yellow-headed, red-winged, rusty, or Brewers blackbirds and all grackles,
cowbirds (does not include cattle egret), crows, or magpies may be controlled without a federal or state
depredation permit when found committing or about to commit depredations on ornamental or shade trees, agricultural crops, livestock, or wildlife, or when concentrated in numbers and in a manner that constitutes a health hazard or other nuisance."
Page 74
http://tpwd.texas.gov/publications/pwdpubs/media/outdoorannual_2014_15.pdfMike