I just read Goliath's Secret by Bonnie Feuer. It features a Goliath frog and other animals from his habitat that want to teach him to communicate. Find out more info at the publisher's website.
This story would be a good discussion starter for talking about differences, or assumptions, or individuality...I can think of several topics besides just the obvious nature/animal lesson. It would be really good to use at the beginning of the school year for a class discussion on appreciating each person's unique style and identifying personal strengths and weaknesses, as well as the idea of trying to help others. Older students might like to write a similar story, using a different group of creatures from a different habitat (making connections and tying science and language arts together). All in all it is a comforting story with all the animals trying to help Goliath - and the surprise ending will appeal to young readers. Younger readers will also enjoy the humor of all the animals assuming that Goliath needs help without asking if he wants any help.