Bird / Circus cyaneus

Hen Harrier

LC

Lowest risk

Vagrant

The hen harrier is a bird of prey. The genus name Circus is derived from Ancient Greek kirkos, meaning 'circle', referring to a bird of prey named for its circling flight. The specific cyaneus is Latin, meaning "dark-blue".

Range mass
290 to 600 g
Range length
41 to 50 cm
Range wingspan
340 to 384 mm
Breeding interval
Northern harriers breed once per season.
Breeding season
Primary females breed from April through July, while secondary females breed from May through September.
Range eggs per season
3 to 5
Average eggs per season
4.4
Average eggs per season
5
Range time to hatching
28 to 36 days
Range fledging age
30 to 35 days
Average age at sexual or reproductive maturity (female)
2 years
Average age at sexual or reproductive maturity (female)
Sex: female
365 days
Average age at sexual or reproductive maturity (male)
3 years
Average age at sexual or reproductive maturity (male)
Sex: male
365 days
Range lifespan
Status: wild
16.19 (high) years
Average lifespan
Status: wild
16.6 months
Average lifespan
Status: wild
197 months
Range territory size
1.7 to 150 km^2

Limas, B. 2001. "Circus cyaneus" (On-line), Animal Diversity Web. Accessed November 10, 2020 at https://animaldiversity.org/accounts/Circus_cyaneus/

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