Bird / Asio flammeus
Short-Eared Owl
Lowest risk
Migratory
The short-eared owl is a species of typical owl. Owls belonging to genus Asio are known as the eared owls, as they have tufts of feathers resembling mammalian ears. These "ear" tufts may or may not be visible. Asio flammeus will display its tufts when in a defensive pose, although its very short tufts are usually not visible. The short-eared owl is found in open country and grasslands. The genus name Asio is a type of eared owl, and flammeus means "flame-coloured".
- Range mass
- 206 to 475 g
- Average mass
- 347 g
- Range length
- 340 to 423 mm
- Range wingspan
- 950 to 1100 mm
- Average basal metabolic rate
- 313.375 cm3.O2/g/hr
- Breeding interval
- Short-eared owls typically breed once yearly in the spring. Second broods have been reported but data is still needed to confirm this.
- Breeding season
- Short-eared owls typically breed late March to June, but mostly in April. In the southern hemisphere, breeding begins in September.
- Range eggs per season
- 1 to 11
- Average eggs per season
- 5.6
- Average eggs per season
- 6
- Range time to hatching
- 21 to 37 days
- Range fledging age
- 24 to 36 days
- Range time to independence
- 31 to 43 minutes
- Average age at sexual or reproductive maturity (female)
- 1 years
- Average age at sexual or reproductive maturity (female)
Sex: female - 365 days
- Average age at sexual or reproductive maturity (male)
- 1 years
- Average age at sexual or reproductive maturity (male)
Sex: male - 365 days
- Range lifespan
Status: wild - 21.8 (high) years
- Average lifespan
Status: wild - 53 months
- Range territory size
- .18 to 2.42 km^2
Doan, N. 1999. "Asio flammeus" (On-line), Animal Diversity Web. Accessed November 10, 2020 at https://animaldiversity.org/accounts/Asio_flammeus/
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