to be honest my last outing was like this. The bird i spooked flew up from a trail i was walking and it flew right into a limb im pretty sure it was a hen cause she was nesting i think and while i was getting closer to her she was purring but i did not knowwhat it was . But we are learning and at least we are on birds.As for the roosting part I had a bird fly up around 545 dont know why but it did. might have been trying to get away from a predator im thinking