Tytonidae
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Barn-houlets (faimily Tytonidae) are ane o the twa faimilies o houlets, the ither bein the true houlets, Strigidae. Thay are medium tae lairge sized houlets wi muckle heids an characteristic heart-shaped faces. Thay hae lang, strang legs wi pouerful talons. Thay differ frae Strigidae in structural details relatin in particular tae the sternum an feet an aw.
| Barn owls Temporal range: Late Eocene tae present
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| Australie masked oul (Tyto novaehollandiae) | |
Scientific classification 
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| Kinrick: | Animalia |
| Phylum: | Chordata |
| Cless: | Aves |
| Order: | Strigiformes |
| Faimily: | Tytonidae Ridgway, 1914 |
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| Synonyms | |
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The barn houlets comprise twa extant sub-faimilies: the Tytoninae or Tyto houlets (includin the Common Barn Houlet) an the Phodilinae or bay-houlets. The Sibley-Ahlquist taxonomy unites the Caprimulgiformes wi the houlet order; here, the barn-houlets are a subfaimily Tytoninae. This is unsupportit bi mair recent research (see Cypselomorphae), but the relationships o the houlets in general are still unresolved.
The barn houlets are a wide rangin faimily, altho thay are absent frae northren North Americae, Saharan Africae an lairge auries o Asie. Thay live in a wide range o habitats frae deserts tae forests, an frae temperate latitudes tae the tropics. The majority o the 16 livin species o barn houlets are puirly kent. Some, like the Reid Houlet, hae barely been seen or studied syne thair discovery, in contrast tae the Common Barn Houlet, which is ane o the best kent houlet species in the warld. However, some sub-species o the Common Barn Houlet possibly deserve tae be a separate species, but are very puirly kent.
Five species o barn-houlet are threatened, an some island species hae gone extinct durin the Holocene or earlier (e.g. Tyto pollens, kent frae the fossil record o Andros Island in the Bahamas, an possibly the basis for the Chickcharnie). The barn-houlets are maistly nocturnal, an generally non-migratory, livin in pairs or singly.
External links
eedit- Barn-Owls on the Internet Bird Collection
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