Bird / Circus cyaneus
Hen Harrier
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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