Denis, bird #3, could it be a Hoary? Notice the pale chest with less stripping as compared to birds 1,2 and 4. Seems to have more white under the tail too. Also bird 3 seems to have a knobbier head between and above the eyes vs the smooth flatter heads of birds 2 and 4. Does not seem to have the "whiteness" seen on some Hoaries but the white chest caught my attention! Welcome all thoughts and comments. Cheers Terry