What do the following animals have in common?

1. RABBIT 

2. HERON

3. MONGOOSE

4. LEMUR

5. CHAMELEON

Answer:

Each animal name conceals the name of another animal, with the letters in correct left-to-right order, though not always consecutive.

1. RAbbiT

2. HEroN

3. monGOOSE

4. lEMUr

5. ChAMELeon