I can’t understand how they do it!

On the one hand, nothing strange happens: the crows are sitting on the top of a tall tree. But these are my crows! And all my crows can't fly. That is why therefore they are mine, and do not live in nature. If they jump, for example, into a flower garden, which is fenced by a low fence, then they pretend that they can not get out. But they forget about their injuries when they need to climb to the top of the spruce and croak at the top of their lungs!