Vague Elephant Project

Inspired by the tall-tale nonsense of the Wampus Country campaign setting, Vague Elephant Project is a collection of creatures and spells suitable for use with your OSR flavor of choice (assuming a B/X or Labyrinth Lord lingua franca).  It's 95% new material that has not previously appeared on the Wampus Country blog!

Erik Jensen is the author of Lumberlands, which contains zero elephants, but a respectable selection of sasquatches, squirrels, weird critters, and flapjacks.

Another available animal-related old-school collection is Theriospheric Transfigurations, a collection of 41 animal-themed spells.