I haven't seen any turkey vultures with white on the head. The description sounds like a crested caracara; if so, that is probably a first state record for NH, since their normal range is south Florida and south Texas. A bird that is much more likely to be in New Hampshire is osprey, a fish-eating eagle. It doesn't have any red on it normally, however. Could the red be blood? Neither bird should be just walking or sitting on the beach for hours. This makes me suspect you are looking at an injured osprey. If you can ascertain that this is the case, it would be good to find a wildlife rehabber who could capture and rehab the bird.

Possibly a starling pair? These birds usually breed earlier and do build their nests in such places. Very aggressive birds.

Oh, yea he's hanging out by onions here. The strawberries are off camera to the right, and the tomatoes are in small planters on either side of the planter he's on now. Those are really the only fruit we have that we've had trouble with; we have watermelon and cantaloupe but they birds ever bother them. could be sparrows, we have a lot of those in the neighborhood. this species is the only one that seems to actually stick around in the garden, thought. i probably should have mentioned that I live in south eastern PA.

Where are you located? Can you describe the sound it makes? When you say "night"......is it completely dark out? What time of night? To start with, check out the sounds that a mockingbird makes. sometimes they sing at night.