Whatbird.com

Hi there.  I have a kind of bird near my house (out in the country, near ponds and swamps, next to a forest, about 20 miles inland from the beach) that I hear but never can see.  I think they might be mating right now (Oct.), as they seem to be calling to each other quite often throughout the day.  I can't tell if they are ...

I'm not sure if this is a red-tailed or red-shouldered hawk.  Can anyone help me?  

I have a few photos of birds that I'm having trouble ID'ing, even after researching them via Internet and in a bird ID book.  I enjoy photography, but I'm still learning about birds, so your help would be greatly appreciated. Thanks!  Sasha  I think these might be finches or sparrows, but I'm not sure which kind:   And ...