No shortage of birds in central TX. We're in a new neighborhood and the constant construction noise has shooed some away, but we still have plenty of hawks, vultures, buzzards, mourning doves, hummingbirds, a bunch of smaller ones I can't identify, owls, and blue jays (which I have only heard but not seen).
Last night my wife woke me up around midnight asking why our phone kept ringing. I finally realized it may have been a bird! It sounded remarkably like a modern phone except it trailed off at the very end -- that was the only indication that it was organic and not electronic. Still no idea what species it could have been. We had never heard it before. I don't think the mockingbirds would make one single sustained sound like that? They usually sound more like a car alarm gone berserk, switching tunes every half-second or so.