1. A mosquito is _______.   a vertebrate   an invertebrate   2. A whale is _______.   an amphibian   a mammal   a reptile   a fish   a bird   Hint Half-n-half Clue   3. A _______ is a vertebrate.   snake   starfish   4. An owl is _______.   an amphibian   a fish   a mammal   a reptile   a bird   Half-n-half Clue   5. A _______ is a bird.   pigeon   mackerel   salamander   crocodile   cow   Half-n-half Clue   6. An _______ is an invertebrate.   amoeba   albatross   7. A _______ is a mammal.   crocodile   frog   mackerel   monkey   crow   Half-n-half Clue