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817 views on 08.05.2015
Location: ZOO, Wrocław, Poland
Specie: Northern Hawk Owl
The Northern Hawk-Owl (Surnia ulula), or Northern Hawk-Owl in North America, is a non-migratory owl that usually stays within its breeding range, though it sometimes irrupts southward. It is one of the few owls that is neither nocturnal nor crepuscular, being active only during the day.
Male Northern Hawk-Owls are generally 36–42.5 cm (14.2–16.7 in) long and weigh 300 g (11 oz). Females are slightly bigger with a length of 37.2–44.7 cm (14.6–17.6 in) and a mass of about 340 g (12 oz). Both male and female have similar wingspans of about 45 cm (18 in).
The Northern Hawk-Owl feeds on a variety of prey, which can include small rodents to mammals more robust in size, and a variety of birds, a typical diet for many boreal owls. In Eurasia the Northern Hawk-Owl is known to feed primarily on voles from the Microtus family.
The Northern Hawk-Owl is one of the least studied and poorly understood birds in North America. It is extremely difficult to study due to its low density occurrence, sporadic fluctuations, and remote breeding locations. This lack of knowledge makes it almost impossible to properly estimate the population levels of this species.
Date taken: 04.05.2014
Camera: Canon EOS 7D
Lens: Tamron SP AF 70-200 mm f/2.8 Di LD (IF) MACRO
1/400s * F/4.0 * 200mm * ISO640
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