Asio otus (Long-eared Owl)
- Species account from the Animal Diversity Web.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Asio_otus.html

Life History of the Short-Eared Owl
- Brief article on the life history of the Short-Eared Owl provided by the California Department of Fish and Game.
- http://www.delta.dfg.ca.gov/gallery/shearowl.asp

Birds of Nova Scotia - Long-eared Owl
- Long-eared Owl status, description, breeding, range, remarks and picture.
- http://museum.gov.ns.ca/mnh/nature/nsbirds/bns0216.htm

Short-Eared Owl
- Short article about the Short-Eared Owl from the Oregon Zoo.
- http://www.oregonzoo.org/Cards/Tundra/owl.short.eared.htm