Proishozhdenie vidov (1993)

A female lets her male counterpart follow her into a bush, where they have sex. You don't see the actual act.

A bird has quick sex with three other birds. Nothing particularly explicit shown, but this is more comical than it sounds.

A woman is shown only wearing her bikini.

There are two moments of off-screen sex during the last segment. But breasts are briefly visible after the first one.