I especially like the 7th photo of tree swallow that you have posted. Last winter we had a team renovating a small old log cabin in the Idaho mountains. In the spring came the tree swallows. What marvelous little acrobats they are!! In that small community some place swallow birdhouses all around their gardens and even put little pools to attract insects for the swallows to feast on. We just placed one birdhouse. Interesting how they do not put perches on the houses for swallows so that bluebirds and other species won't use them. Anyway, I just really enjoyed looking at your photos this afternoon.