SNN (ScrollingNetworkNews) ✿ ✿ Our Mel and Sydney returned to their nesting box with plenty of bonding occurring..but after 2.5 months of Sydney in the box from Dec 2013 to mid Feb 2014, the lack of prey gifts from Mel ( perhaps due to the severe and historic drought underway in California)and they have forgone the nesting process this year as many other raptors ✿ Compared to other owls of similar size, the Barn Owl has a much higher metabolic rate, requiring relatively more food. Pound for pound, Barn Owls consume more rodents – often regarded as pests by humans – than possibly any other creature. ✿ We remind viewers that sometimes owlets may not survive - the parents will dispose of things in "The Owl Way" -viewer discretion is advised, this is nature and the "Owl way". ✿ ~ ✿ “Animals, like us, are living souls. They are not things. They are not objects. Neither are they human. Yet they mourn. They love. They dance. They suffer. They know the peaks and chasms of being.” ― Gary Kowalski, The Souls of Animals ✿ Each species is a masterpiece, a creation assembled with extreme care and genius." ~ E.O. Wilson

Monday, January 21, 2013

I H(ear) You

Barred Owl ear opening
Because Owls are generally active at night, they have a highly developed auditory (hearing) system.

The ears are located at the sides of the head, behind the eyes, and are covered by the feathers of the facial disc. The “Ear Tufts” visible on some species are not ears at all, but simply display feathers.

An Owl’s range of audible sounds is not unlike that of humans, but an Owl’s hearing is much more acute at certain frequencies enabling it to hear even the slightest movement of their prey in leaves or undergrowth.
Some Owl species have asymmetrically set ear openings (i.e. one ear is higher than the other) – in particular the strictly nocturnal species, such as the Barn Owl or the Tengmalm’s (Boreal) Owl. These species have a very pronounced facial disc, which acts like a “radar dish”, guiding sounds into the ear openings. The shape of the disc can be altered at will, using special facial muscles.
Also, an Owl’s bill is pointed downward, increasing the surface area over which the soundwaves are collected by the facial disc.

Great Gray Owl ear opening
In 4 species (Ural, Great Gray, Boreal/Tengmalm’s & Saw-whet), the ear asymmetry is actually in the temporal parts of the skull, giving it a “lop-sided” appearance.

The shape of the ear opening (known as the aperture) depends on the species of Owl – in some species, the opening has a valve, called an operculum covering it . The opening varies from a small, round aperture to an oblong slit with a large operculum. All owls of the family Tytonidae have rounded openings with large opercula, while in Strigidae, the shape of the outer ear is more varied.