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Snowy owls have been seen to be active even during the very brief winter daytime in the northern winter. [7] During the Arctic summer, snowy owls may tend to peak in activity during the twilight that is the darkest time available given the lack of full nightfall.
Burrowing owls have bright eyes; their beaks can be dark yellow or gray depending on the subspecies. They lack ear tufts and have a flattened facial disc. The owls have prominent white eyebrows and a white "chin" patch which they expand and display during certain behaviors, such as a bobbing of the head when agitated.
Several types of owls are crepuscular—active during the twilight hours of dawn and dusk; one example is the pygmy owl (Glaucidium). A few owls are active during the day, also; examples are the burrowing owl (Speotyto cunicularia) and the short-eared owl (Asio flammeus). Much of the owls' hunting strategy depends on stealth and surprise.
Due to meeting the needs of their nestlings, eastern screech owls frequently consume less per day during summer than they do during winter. Five owls captured in April, averaging about 160 g (5 + 3 ⁄ 4 oz) in males and 190 g (6 + 3 ⁄ 4 oz) in females, gained on average 28 g (1 oz) when captured in fall (October–December) and 13 g (1 ⁄ 2 ...
Snowy owls are active day and night and use their keen hearing and sight to capture prey. Lemmings are the most common prey item for snowies in the Arctic. In Wisconsin the birds often catch and ...
Two broad strategies for winter survival have evolved within Insecta as solutions to their inability to generate significant heat metabolically. Migration is a complete avoidance of the temperatures that pose a threat. An alternative to migration is weathering the cold temperatures present in its normal habitat.
Snowy owls are invading New York. And the freezing cold temperatures are to thank for their arrival. So far, at least seven of the owls have been spotted in the New York City area. Including on ...
The bird family Tytonidae, which includes the barn owls Tyto and the bay owls Phodilus, is one of the two families of owls, the other being the true owls or typical owls, Strigidae. They are medium to large owls with large heads and characteristic heart-shaped faces. They have long, strong legs with powerful talons. They also differ from the ...