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Burrowing owls will also nest in shallow, underground, man-made structures that have easy access to the surface. During the nesting season, burrowing owls will collect a wide variety of materials to line their nest, some of which are left around the entrance to the burrow. The most common material is mammal dung, usually from cattle.
Some crepuscular animals may also be active by moonlight or during an overcast day. Matutinal animals are active only after dawn, and vespertine only before dusk. A number of factors affect the time of day an animal is active. Predators hunt when their prey is available, and prey try to avoid the times when their principal predators are at large.
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.
A recent BirdNote podcast helped to explain exactly why the little creatures bob their little heads up and down.
Snowy owls may be active to some extent at both day, from dawn to dusk, and night. [6] 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.
The dusky eagle-owl is not deterred by daylight though is largely active at night emerging from its roost shortly before sunset. The species has been seen hunting during the day during cloudy weather. [2] The nesting season is from November to April, with most of the breeding observed during December and January. [2]
Image credits: an1malpulse #5. Animal campaigners are calling for a ban on the public sale of fireworks after a baby red panda was thought to have died from stress related to the noise.
The collared owlet is most active during daylight. Being diurnal, this bird can be seen perching, hunting and calling during most parts of the day, and sometimes during the night. [14] It is often mobbed by other small birds when roosting. [6]