adj. Refers to animals with young that are unable to move on their own after hatching or birth, and require extensive parental care. Songbirds, dogs, and humans are examples of species with altricial [..]

See nidicolous.

depicting of animals, such as mammals, which aren't completely formed and grown at the time they are born, thus, they need a lot of patient and consistent care going above and beyond feeding and [..]

Born in a relatively underdeveloped state as is the case of peregrine falcon chicks.

Referring to animals that are born in an undeveloped state and depend on maternal care, as human infants do. Compare precocial.

(adj) (of hatchlings) naked and blind and dependent on parents for food

young are born in a relatively underdeveloped state; they are unable to feed or care for themselves or locomote independently for a period of time after birth/hatching. In birds, naked and helpless af [..]

Helpless at birth, requiring complete parental care. This term is used to describe some bird species, such as parrots, that need time to grow their feathers and gain strength in their wings to fly.

Having the young born in an immature and helpless condition.

(zoology) Helpless at birth (of young animals); or having young which are helpless at birth. *having young which are helpless at birth