- Arizona-Sonora Desert Museum: Owls
- Furnishes details on Sonoran species, their families, appearance, activity periods, size, feeding habits, hunting, nesting, and parenting.
- Australia Zoo: Barking Owl (Ninox connivens)
- Amazing Animals factsheet covers zoo animal profile and diaries, threat level, senses, flight, territory, prey, breeding, and status.
- Barred Owl (Strix varia)
- Discusses measurements, names and etymology, description, flight style, voice, roosting and hunting areas, range, social behavior, diet, and pictures of young.
- BBC Nature: Little Owl (Athene noctua)
- Reports on Britain's smallest owl, including size, markings, range, periods of activity, nesting, history, and calls.
- Burrowing Owl (Athene cunicularia)
- Information from Carolina Raptor Center gives description, size, coloration, meaning of name, classification, sounds, nesting locations and distribution, food, and taxonomy.
- Burrowing Owl (Speotyto cunicularia)
- Includes picture, size, appearance, voice, breeding range, winter locations, diet, burrows, and clutch size. From BCAdventure.com.
- Eastern Screech-Owl (Otus asio)
- Peregrine Fund examines appearance and size, distribution, hunting strategy, parenting, name derivation, images, and interesting facts.
- Elf Owl Biology
- Owling.com reference page presents map, names, location by subspecies, size range, distinguishing characteristics, habitat, food, breeding, and movements.
- Explore Raptors: Great Gray Owl (Strix nebulosa)
- Peregrine Fund page looks at images and map of distribution, life cycle, prey and hunting, measurements, habitat, senses, and size comparison to other species.
- Grass Owl (Tyto capensis)
- Features threat level, printable factsheet, profile of zoo specimen, prey by location, habitat, coloring, and breeding season. From Australia Zoo Amazing Animals.
- Long-eared Owl (Asio otus)
- Gives images, size and weight, appearance, nesting, range, habitat, diet, behavior, conservation information, and printable version.
- Northern Pygmy-Owl Biology
- Provides range map, scientific and common names, subspecies, measurements, physical features, habitats, diet, breeding behavior, and migration. From Owling.com.
- Owling.com: Great Horned Owl
- Presents gallery and additional pictures, audio recordings, field notes, and link to in-depth biological information.
- Owling.com: Snowy Owl
- Brief article reviews appearance, size, coloration, vocalizations, and length. Includes images and link to natural history.
- Peregrine Fund: Northern Pygmy-Owl (Glaucidium gnoma)
- Furnishes measurements, habitat and range map, photographs, prey and periods of activity, life cycle, source of names, and food storage.
- Short-eared Owl (Asio flammeus)
- From BBC Nature, Wildfacts page discusses measurements, appearance, Britain and world ranges, preferred habitat, activity, population, and vocabulary.
- Snowy Owl (Nyctea scandiaca)
- Covers reproductive behavior, size and appearance, range and map, names and meaning, pictures, prey, regional differences, and staggered hatching. Factsheet from Peregrine Fund.
- Tawny Owl (Strix aluco)
- Wildfacts sheet from BBC Nature combines images with weight, appearance, range, nesting areas, hunting, mating, threats, and communication.
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