The northern harrier is 41–52 cm (16–20 in) long with a 97–122 cm (38–48 in) wingspan. It resembles other harriers in having distinct male and female plumages. The sexes also differ in weight, with males weighing 290 to 400 g (10 to 14 oz), with an average of 350 g (12 oz), and females weighing 390 to 750 g (14 to 26 oz), with an average of 530 g (19 oz). Among standard measurements, the wing chord is 32. 8 to 40. 6 cm (12. 9 to 16. 0 in), the tail is 19. 3 to 25. 8 cm (7. 6 to 10. 2 in) and the tarsus is 7. 1 to 8. 9 cm (2. 8 to 3. 5 in). It is relatively long winged and long tailed, having the longest wing and tail relative to its body size of any raptor occurring in North America.