Sexual maturity at sub-adult size is also found in reptiles and in medium- to large-sized mammals, but birds and small mammals reach sexual maturity only after they are full-grown—which happens within their first year.
Spolna zrelost u adolescentnoj dobi također se može naći kod gmazova i kod sisavaca srednje do velike veličine, ali ptice i maleni sisavci dostižu spolnu zrelost samo nakon što dostignu punu veličinu - što se dešava u njihovoj prvoj godini.