Barn Owl. They may be confused with a large white bird when in movement in the air. Barn Owl Box Company Booth at the World Ag Expo Tulare CA December 15, 2017 - 12:12 pm Newly Published Paper Shows How Barn Owls Can Reduce Rodents in Agriculture August 5, 2017 - 3:29 pm Wyoming Barn Owls December 2, 2016 - 9:32 am This is the largest race (physical size) of Barn Owl in the world. If a hen produces a clutch of 6 eggs, which we have found to be about average, the hen would be brooding her eggs and newly hatched chicks for about 60 days. The Western Barn Owl is a medium sized owl with no ear-tufts and a heart-shaped face. Barn Owls are essentially nonmigratory, although young birds may move some distance in search of new breeding grounds. This individual was recorded in Poland by Jarek Matusiak, XC415447. Weight: Males, 14-19 ounces; females, 17-25 ounces. The ideal size for Barn Owl boxes is 1m 2 (floor area) x 1m depth but such big boxes are generally impractical. BARN OWL SIZE: . The species name "alba" refers to the colour white.Other names for the Barn Owl have included Monkey-faced Owl, Ghost Owl, and Church Owl. At least 28 subspecies have been identified, mostly differing in size and color. Audio: The Barn Owl is more often heard than seen. Length: Males, 13-15 inches; females, 14-20 inches. She may take short flights at Daytime roost is usually an evergreen tree, belfry or barn. For any Barn Owl nestbox less than 700mm deep, an exercise/landing platform below the entrance hole is vital for the safety of young fledglings. Climbing/jumping young birds can get from the platform onto the roof of the box and (ideally) onto other nearby perching places. The ranges of these are not well defined and also need review so are not listed here. The average size of the male might be between 25 and 40 cm long with the wings spanning approximately 50 cm in length. Habitat: Open areas, such as grassy fields, old fields, wet meadows and wetland edges, around farms and rural towns. T. a. pratincola is found in S. W. British Columbia south and east through most of the U. S. (except some of the northern-central states) and Mexico. Western Barn Owl ~ Tyto alba Introduction. Discovered in its daytime retreat, the Height: Males 32 - 40 cm (13 - 16 in), Females 32 - 40 cm (13 - 16 in) Weight: Males 440 - 510 g (1.0 lbs), Females 510 - 625 g (1.2 lbs) Wingspan: Males 100 - 125 cm (39 - 49 in), Females 100 - 125 cm (39 - 49 in) . With its ghostly appearance, rasping shrieks, and habit of roosting in such places as church belfries, this bird has attracted much superstition. The male owl is generally whiter than the female. They weigh on average 1/2kg for most species. Measurements and Weights: Wingspan: 43 – 47 in. Tyto alba. Overall size. However, it is really a good omen for farmers who find it in their barns, for it preys chiefly on mice and rats. The American barn owl stands at about 14” tall with a wingspan as great as 43”.