Here is what we call in Boston, a "double decker" (pronounced as a double decka of course) :-)
The parents fly in and out of the nests in search for food. They have pockets in their throat where they store food for the babies and regurgitate it in the nest to feed their young.
"Daddy's Home"......notice the size of the chicks in this shot. They were smaller than most of the other chicks we saw in the nests. This family must have started a bit later than most of the others.
A different nest with larger chicks waiting for food after Dad came home:
Was an incredible experience to witness this. If you decide to go, you will want to bring bug spray. The mosquitos were ferocious. We sprayed ourselves when we got out of the car but I was wishing I brought the spray with me as well.