The Largest ????

They are tough ones Pat.

  1. A hawk of one kind. Land animal is a Cheetah, marine I think is a barracuda but the hawk can travel at over 100 MPH in a dive.

  2. While walking makes it a land animal, though maybe not exclusively. I will guess a croc or alligator when underwater.

  3. To heavy and wing shape requiring a critical speed to be reached to get sufficient lift.

  4. Thats the Viper or more commonly known as Adder. Diamond pattern on the back.

  5. Biggest fish? Game fish of one kind a Marlin or maybe a Great White Shark. Definately not the Blue Whale because that is a mammal.

How did I do?