Aperil day 29: Tarsier

Aperil day 29.
Tarsier (Tarsiidae)

They are entirely insectovorous, which makes them the only primate that is entirely carnivorous.

While I was working on it I posted a sketch to some friends who asked why it had 5 feet? I had been working with several references and realized another foot had slipped in! That gave me a good laugh, so in the sketches you can see the extra foot :D
Did any of you make a similar mistake?