Breeding colony for birds and also for mammals such as penguins, seals and turtles (7)
I believe the answer is:
rookery
(Other definitions for rookery that I've seen before include "Breeding colony of birds, also of seals or turtles" , "Seal, penguin, colony" , "Community of birds" , "Nesting-place" , "Breeding-place of birds, penguins, seals" .)