Marsh owls nest on the ground on open marshy areas, laying 2-4 eggs amongst tussocks.
The marsh owl is 35–37 centimetres (14–15 in) in length with an 82–99 centimetres (32–39 in) wingspan. It is similar to the slightly larger short-eared owl. It has yellow eyes with a black iris, and short ear-tufts which are not usually visible. It is distinguished from its relative by its dark brown plumage, and almost unstreaked upperparts. It is long winged, and glides slowly on stiff wings when hunting. It will often perch on the ground or low posts.
The call is a frog-like kaar or rasping whistle "shrss".
- Marsh Owl - Species text in The Atlas of Southern African Birds.
Media related to Asio capensis at Wikimedia Commons