Here's why:
* Mammals are warm-blooded animals that give birth to live young, nurse their offspring with milk, and have fur or hair. Pandas fit all these criteria.
* Reptiles are cold-blooded, lay eggs, and have scales.
* Amphibians are cold-blooded, lay eggs in water, and have smooth, moist skin.
* Fish are cold-blooded, live in water, and breathe with gills.