Varies depending on the species
15 to 118 cm
Medium-sized with long tail feathers
1.5 to 2 meters
Slender and medium-sized
19-24 inches
Medium-sized and muscular
2-3 mm
Oval-shaped
Up to 2.5 meters
Large, robust
2.4 - 3.5 meters
Large and robust
22-27 inches
Medium-sized, muscular
4.7-5.1 inches
Small and slender
1 - 2 mm
Small and soft-bodied
30-60 cm
Streamlined and elongated
25 to 38 cm
Deep and laterally compressed
Up to 160 cm
Long, slender body with strong legs
22-26 inches (56-66 cm)
Medium to large
1.8 to 2.5 meters (5.9 to 8.2 feet)
Slender and elongated body with a coffin-shaped head
Up to 5 meters
Streamlined and elongated body
18 to 26 inches
3 to 5 feet
Cylindrical