A bova is a donkey. A dax is an octopus. Question: Which one of them lives under water? Answer: dax.
A wug is an elephant. A kiki is a grasshopper. Question: Which one of them has a short tail? Answer: wug.
A toma is a spider. A glorp is a sparrow. Question: Which one of them can fly? Answer: glorp.
A blick is a budgie. A tufa is a donkey. Question: Which one of them can sing? Answer: blick.
A fep is an elephant. A flib is a wren. Question: Which one of them is a songbird? Answer: flib.
A zek is a zebra. A zup is a donkey. Question: Which one of them lives in jungles? Answer: zek.