10-60 cm
Elongated and slender
4 to 6 feet
Tall and slender with long legs and a long neck
10-35 cm
Elongated and cylindrical
Up to 25 inches
Long, segmented body with a large, muscular tail
2-5 cm
Long and slender
8 to 10 inches
Small, compact
Adult females: 3 to 4 mm, Adult males: 2.5 to 3 mm
Oval and flat
13-16 inches
Medium-sized owl with a round head and long ear tufts
22-27 inches
Medium-sized, muscular
13-15 cm
Small and compact
5 to 15 mm
Small, round abdomen with six long, spiny yellow or orange projections (spines)
Up to 13 feet (4 meters)
Streamlined and elongated
Up to 6 feet
Narrow and elongated
About 10 to 14 inches
Small to medium-sized birds with a stocky build and a short tail
About 11 to 15 inches
Small and slender
50-80 cm
Medium-sized with a compact and muscular build
Up to 60 cm (23.6 inches)
Robust and laterally compressed
3-4.5 inches
Large and delicate