Blue hawk

Weight

346 g – 522.5 g

Length

Not recorded

Lifespan

16.4 years – 17.1 years

Diet

Carnivore

Main food

Not recorded

Habitat

grassland

Egg incubation

31 days

Young per litter or clutch

4.5

Age at maturity

12 months – 19.2 months

Litters or clutches a year

1

Lifestyle

Aerial

Migration

Migratory

Conservation status

Not recorded

Countries on record

Not recorded

Not recorded

No conservation assessment is recorded for this species in our sources. That is not the same as being safe: it has not been matched to an assessment.

1. kingdomAnimalia
2. phylumChordata
3. classAves
4. orderAccipitriformes
5. familyAccipitridae
6. genusCircus
7. SpeciesCircus hudsonius (Linnaeus, 1766)

Synonyms Circus cyaneus hudsonius, Circus uliginosus, Falco hudsonius, Falco uliginosus

Catalogue of Life

LC, Least Concern

Hen harrier

Circus cyaneus

Accipitridae

LC, Least Concern

Western marsh harrier

Circus aeruginosus

Accipitridae

NT, Near Threatened

Pallid harrier

Circus macrourus

Accipitridae

LC, Least Concern

Montagu's harrier

Circus pygargus

Accipitridae

P

Pied harrier

Circus melanoleucos

AccipitridaeNo free photo yet

H

Harrier hawk

Circus approximans

AccipitridaeNo free photo yet

CompareBlue hawk vs Hen harrierBlue hawk vs Western marsh harrierBlue hawk vs Pallid harrierBlue hawk vs Montagu's harrier

• An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
  Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1
• AmphiBIO, a global database for amphibian ecological traits · CC BY 4.0 · v1
  Oliveira, B.F., São-Pedro, V.A., Santos-Barrera, G., Penone, C. & Costa, G.C. (2017) AmphiBIO, a global database for amphibian ecological traits. Scientific Data 4: 170123. https://doi.org/10.1038/sdata.2017.123. Data: https://doi.org/10.6084/m9.figshare.4644424.v5
• AVONET: morphological, ecological and geographical data for all birds · CC BY 4.0 · v7
  Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7
• Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
  Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
• Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
  Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
• EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
  Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1
• Wikidata · CC0 1.0 · 2026-11-11
  Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service).
• Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
  Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).

@misc{blue_hawk_2026,
  title = {Blue hawk (Circus hudsonius)},
  author = {{CreatureData}},
  year = {2026},
  url = {https://creaturedata.com/animals/blue-hawk},
  note = {Data as of 2026-11-11}
}