There's a bird in this image

A game I played with my parents, later it evolved into "there is a xx in this image", "there are ## xx in this image". Some are extremely straightforward, others kind of difficult to see. Join the game if you're bored. 
There's a bird in this image There's a bird in this image there's a bird in this image There's a bird in this image There's a bird in this image There are 3 squirrels in this image There's a bird in this image There are four squirrels in this image There used to be a tree there is a bird in this image there is a bird in this image there is a bird in this image