Baby blackbird's are equipped to fly the nest very soon, before they can fly and gather food. They will flop out and become fledglings.
1 year
10 days
Between 10 and 19 days is commonly quoted amongst birdwatchers but eggs hatched in aviaries invariably take 14 days. While a longer incubation period for eggs laid in habitat could possibly be the result of disturbance, a shorter incubation period than 14 days is exceedingly unlikely.
It takes about 13 days after hatching before a Bluet Robin to fly from the nest. This is after the mother has left them.
blackbirds
Sparrow chicks typically fledge, or leave the nest, about 2 to 3 weeks after hatching. During this time, they grow rapidly and develop the necessary feathers and strength for flight. Once they fledge, they may still depend on their parents for food and protection for a short period before becoming fully independent.
Tawny Frogmouths fledge at 25-35 days.
Blackbirds reproduce by laying eggs.
a group of Blackbirds is called a murder
Pine grosbeak chicks typically fledge about 13 to 16 days after hatching. During this period, the parents feed the young birds, helping them grow strong enough to leave the nest. After fledging, the young grosbeaks may still rely on their parents for food and support for a short time before becoming fully independent.
They can fly as soon as they fledge. The parents will fly and swoop with them though.
There is no specific collective noun for blackbirds but any collective noun for birds will do; for example a flight of blackbirds or a flock of blackbirds.