1. A spider is _______.   an invertebrate   a vertebrate   2. A mosquito is _______.   an invertebrate   a vertebrate   3. A whale is _______.   a fish   a mammal   an amphibian   a bird   a reptile   Hint Half-n-half Clue   4. A snake is _______.   a mammal   a bird   a fish   an amphibian   a reptile   Half-n-half Clue   5. A _______ is a bird.   cow   crocodile   mackerel   pigeon   salamander   Half-n-half Clue   6. A _______ is a vertebrate.   snake   starfish   7. A _______ is a fish.   horse   frog   sardine   dove   lizard   Half-n-half Clue