I suppose it could be considered a lion.

I am writing these poems
From inside a lion,
And it's rather dark in here.
So please excuse the handwriting
Which may not be too clear.
But this afternoon by the lion's cage
I'm afraid I got too near.
And I'm writing these lines
From inside a lion,
And it's rather dark in here.

Thank you Mr. Silverstein, you said what I couldn't.