Which one of the following statements is incorrect?

1. Birds and land snails are uricotelic animals
2. Mammals and frogs are ureotelic animals
3. Aquatic amphibians and aquatic insects are ammonotelic animals
4. Birds and reptiles are ureotelic

(d) Birds and reptiles are uricotelic (not ureotelic) as they excrete nitrogenous waste uric acid in the form of pellet or paste with a minimum loss of water.