The cuckoo bird is the laziest parent.
nuclear family extended family adopted family single-parent family step family
possibly
Songbirds and non-singing birds, possibly cats, worms, lady bugs, and grasshoppers.
No. The whole reptile family, and bony fish. Also, its possibly pushing the definition of eggs, but amphibians spawn.
Yes, baby birds have the same body as the parent when they are born all except for feathers. Within 12 to 14 days the baby birds develop all of their feathers.
Parent birds care for their young at least until they are able to fly.
For a lot of species, cock and hen .
Birds, if birds are mammles, then mamless
Possibly, if they can catch them.
About 1 billion birds are killed in the US every year so possibly, 5 to 10 billion birds per year. As for per day, possibly 1 to 10,000 birds.
Pinnacle foods
Cage - no, aviary - possibly but not with similar, particularly red, birds.