Harpy

The Kestrel can be found in Sensual Sands. They produce Harpy Milk and Harpy Semen.

The harpy can be seduced by giving Fox Semen. The Bats can be found in Virgin Breaks when entering the Cave, that is right from the path that leads up to the Dragons. They produce Harpy Milk and Harpy Semen.

Bat(Female) can be seduced with Demon Milk