Daniel replies:

It may have been within the last two years. One we did was I Crocodile, but there was another one, a little tiny book, and the title escapes me. Unless the Great Ed has it recorded, you might try emailing the program (WESAT@npr.org). The Christmas Crocodile was a selection on Chinwag Theater, but I don't think that's the one you mean either. (Hint: The one you refer to may have been from a Louisiana publisher. Pelican Books?) 
It may be Alligator Tales: and Crocodiles too!, by Miles Smeeton, published by (indeed) Pelican Books. --Ed.