World’s Largest and Smallest:

Birds

North African Ostrich – 9ft tall; 345 lbs

Bumble Bee Hummingbird – 2.5 in; 0.06 ounces

Mammals

Blue Whale – 80 ft; 150 tons

African Elephant - 10 feet at shoulder; 5 tons

Kitti’s Hognosed (Bumble Bee) Bat – 1.2 in; 0.07 ounces

Reptiles

Leatherback Turtle – 1600 pounds

Australian Saltwater Crocodile – 27 feet

A two lizard tie: S. parthenopion, and S. ariasiae -  both 0.5 in

Amphibians

Chinese Giant Salamander – 5ft 11in

Cuban Poison Arrow Frog – 0.4 inches

Fish

Whale Shark – 45 feet

Photocorynus spiniceps - 0.25 inches

Invertebrates

Giant Squid – 59 ft; 1 ton

Rotifers – less than 0.12 in

United States Largest and Smallest:

Birds

Trumpeter Swan – 72 in; 8ft wingspan

Bumble Bee Hummingbird – 2.5 in; 0.06 ounces

Mammals

Blue Whale – 80 ft; 150 tons

Kodiak (Brown) Bear - 10 feet nose to tail; over 1000 lbs

Pygmy Shrew – 1 in; 0.25 ounces

Reptiles

Leatherback Turtle – 1600 pounds

American Alligator – 19 feet

Amphibians

Two Toed Amphiuma – 45 inches

Little Grass Frog – 0.5 inches

Fish

Whale Shark – 45 feet

Atlantic Sturgeon – 14 feet

Everglades Pigmy Sunfish – 1.25  inches

Invertebrates

Pacific Giant Octopus – 20 feet arm spread

Rotifers – less than 0.12 inches

Northwest Largest and Smallest:

Birds

Trumpeter Swan – 72 in, 8ft wingspan

Bumble Bee Hummingbird – 2.5 in, 0.06 ounces

Mammals

Blue Whale – 80 ft; 150 tons

Grizzly (Brown) Bear - 8 feet nose to tail; 1000 lbs

Pygmy Shrew – 1 in; 1.25 ounces

Reptiles

Leatherback Turtle – 1600 pounds

Ornate Tree Lizard – 1.5 inches

Amphibians

Pacific Giant Salamander – 13 inches

Olympic Salamander – 2 inches

Fish

Great White Shark – 30 feet

Green Sturgeon – 7 feet

Least Chub – 2.5 inches

Invertebrates

Pacific Giant Octopus - 20 feet arm spread

Rotifers – less than 0.12 inches