45-55 centimeters
Medium-sized duck with a stocky body and a round head
Up to 5 feet (1.5 meters)
Streamlined
95 to 100 cm
Tall and stocky
12-14 cm
Small and compact
Up to 2 meters (6.6 feet)
Long, slender
Up to 1.8 meters
24-28 inches
Large
2 to 6 feet
Slender and elongated body
64 to 81 cm (25 to 32 in)
Large and bulky body, short tail, and small beak
17-20 centimeters (6.7-7.9 inches)
Compact body with a large head, short neck, and a long, sharp beak
Up to 1 meter
Elongated and eel-like
40-60 cm
Slender and elongated
12-24 inches
Slender and cylindrical
40-55 cm
Medium-sized
About 0.2 to 1 inch (5 to 25 mm)
Oval-shaped body with a narrow head and elongated mouthparts
Up to 30 cm (11.8 inches)
Oval and laterally compressed
18 to 22 inches
Small with long legs and ears
Up to 3.2 meters
Elongated and cylindrical