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