Difference between a male & female barn owl

Determining with 100 per cent accuracy whether a barn owl is male or female can be a daunting task even for experts. It is difficult to know what sex a barn owl is without comparing it to a barn owl of the opposite sex, and even then, it is not an exacting science. Sometimes the sex can not be determined without veterinarian assistance.

The barn owl is the most popular and widespread species of owl. The barn owl is found almost anywhere in the world save for deserts, the North and South Poles, Indonesia and the Pacific Islands. Barn owls have long wings and legs with a short tail and a large, white, heart-shaped face. The wingspan on a barn owl is 75 cm to 110 cm (30 inches to 43 inches) and the owl averages 23 cm to 45 cm (9 inches to 18 inches) in height. Barn owls are carnivores, silently hunting mice and other small animals usually three times a day; once at dusk, again at midnight and once more before dawn. They fly silently and gracefully. Although they can not actually see in the dark, they can hunt in light too dim for a human's eyes. They have a shrill screech that is heard for long distances. The screech, combined with their dark eyes and white face, have given the barn owl some random other names, for example, white owl, ghost owl, night owl, hissing owl, hobgoblin and delicate owl.

Barn owls do live in old barns and buildings. However, they are not relegated to only old buildings as housing. Barn owls also live in trees, usually closely bunched evergreen trees, but in other trees as well, including palm trees. Barn owls do not get large enough to swoop down and grab hapless dogs or cats. However, they have spot on accuracy when it comes to swooping down on a small bird, mouse or other rodent. Many people have barn owls living in their trees without even knowing it until they hear the chilling screech.

The first item separating male from a female is size. Like many other raptors, the female is slightly larger than the male. She also has darker legs while the male has singularly pale legs. The female's beak is buff colour; however, the male's beak is more of an ivory colour. The female can weigh up to 0.5 kg. more than the male with a slightly wider wingspan. Obviously these differences would mean nothing to the casual observer who does not have a male and female sitting side by side.

In some barn owls, it is possible to determine the sex without an owl of the opposite sex to compare. This determination is made by the colouring of the feathers. A male has a white throat, while a female has a brown one. The throat colouring on both owls extends along the sides of their heads just behind the face disk in their respective colours. The under wings of the male and the female owls are white. However, a female will have minuscule black spots near the joint of the wing. The spots can be as small as the head of a pin or as large as the end of a matchstick. The back feathers of the male are very pale brown or yellowish with areas of light grey and white. Females have brown and darker grey back feathers. The tail feathers of the males are pale buff or white with light grey. Females are brown with darker grey or black barring. The trailing end of each wing feather is white in both male and female. The main portion of each wing feather is golden brown with light grey barring for male and brown with black or dark grey barring for the female. One thing that should be kept in mind when trying to sex barn owls, the older a female gets, the less characteristically female she becomes. A female barn owl's colouring can change as she ages making it harder to tell her from a male.