I've had one other old toy mold in this shop similar in construction to this birdy--which I just found along with a pig, listed separately--and find them so evocative  looking, I'm quite fascinated by them. This one is made all the more surreal by the screws and bolts all over, I believe allowing for tightening once filled, then loosing to release. There is still some stuff inside the mold, which I think one could pry it out if desired, though personally I find the black head and tail on the mold side makes it feel all the more strange!  Happily it stands up on its own two webbed feet, looking as if singing up a storm.

5 1/8" x 2 3/4" x 1" and in good shape, with just a little cracking/roughness  along the edges off the wood.