Pipistrelle :: Pipistrelle (n.) A small European bat (Vesperugo pipistrellus); -- called also flittermouse.
Pipit :: Pipit (n.) Any one of numerous species of small singing birds belonging to Anthus and allied genera, of the family Motacillidae. They strongly resemble the true larks in habits, colors, and the great length of the hind claw. They are, therefore, often called titlarks, and pipit larks..