4 to 5 feet (1.2 to 1.5 meters)
Streamlined
Up to 3 cm
Oval and flattened
0.2-30 centimeters
Slug-like
Most species range from 1 to 3 meters (3 to 10 feet)
Long and slender
Up to 10 cm
Small body size with long, thin legs
0.5 inches to 5.9 feet
Tubular or Asymmetrical
30 - 80 cm
Streamlined and elongated
2 to 6 feet (0.6 to 1.8 meters)
Streamlined with a large, flippers
Varies depending on species
Globular or flattened
15-26 inches
Medium to large size, long wings, long and pointed beak
Range from 0.6 inches to 14 inches
4.6 to 6 feet (1.4 to 1.8 meters)
Approximately 10 inches (25 cm)
Compact and muscular
12-15 cm
Small bird with a plump body and a relatively long, slender bill
6 to 9 centimeters
Stocky
50-60 feet
Slender and streamlined
23-26 cm
Medium-sized parrot with a stocky build
1.4 to 1.6 meters
Medium to large