Really cool pictures.
Who cooks for you ? is their signature call. It's really cool. We have two of them that hang out in the back. There is also two big, I mean big ones back there too. I took a picture of one of the big ones two years ago by the pond. It stood about 2 1/2 - 3ft. Not sure what kind of owl the big ones are.
The big owl is most likely a Great Horned owl. Real common here in Texas. I hope to have some video of my local Screach owl when he comes back in Dec.