Bird with Brains

It's the season for birds to usher the next generation into the world, and they can be pretty clever doing it.  I saw one flying repeatedly into the Y in this tree, first photo.  

When I got close to investigate I pointed the camera down into the Y and heard a hissing that sounded like a snake, which spooked me considerably.  Turns out it was the mother bird pictured in this 2nd photo trying to scare me away.  Critters in Wimberley have been amazing me for about 14 years now!