Mottled Wood Owl

Mottled Wood Owl
S. o. ocellata (from near Bangalore)
Conservation status
Least Concern (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Strigiformes
Family:	Strigidae
Genus:	Strix
Species:	S. ocellata
Binomial name
Strix ocellata (Lesson, 1839)
Synonyms
Syrnium ocellatum Bulaca ocellata

The Mottled Wood Owl (Strix ocellata) is a species of large owl found in India. They are found in gardens and thin deciduous forests adjacent to dry thorn forests or farmland. They are easily detected by their distinctive tremulous eerie calls at dawn and dusk. The characteristic call is a duet of the male and female while other notes include a low hoot and a screech. Their large size, lack of "ear" tufts and the concentric barring on the face make them easy to identify.

Description

S. o. grisescens at Gir National Park, India

This large owl lacks ear tufts and is mottled and vermiculated in reddish brown and white. The face disc is marked with fine concentric black and white barring. The sexes are alike. The chin is white.^[2] The eyelid is orange and the iris is dark brown.^[3] The tail is barred narrowly in brown and black.^[4] The concentric barring on the face and mottled crown separate it from the Brown Wood Owl in southern India.^[5]

There are three subspecies recognized and there are no sharp demarcations in their distributions.^[2]

• S. o. ocellata (Lesson, 1839) is found in southern India and is shorter winged in the males (333–338 mm) than grandis
• S. o. grisescens Koelz, 1950 is found in northern India south of the Himalayas, west to Pakistan and east to Bihar. The markings are pale above and the males have a wing length of 338–346 mm
• S. o. grandis Koelz, 1950 from Gujarat is differentiated by the wing length of the males (360–372 mm)

Distribution and habitat

The species is found in the plains in gardens and lightly wooded habitats. They roost in trees during the day choosing a branch with dense foliage. An old specimen from Lahore is noted but no records in recent times from Pakistan. The distribution extends east to West Bengal.^[5]

Behaviour and ecology

These owls roost in the day, usually in pairs. When disturbed they may fly in bright sunshine although they choose to shelter within a dense grove of trees. They produce an eerie chuhua-aa call with a quaver in the second note. This call is an antiphonal duet of the male and female. The male calls one or two times followed by the female's shorter and less tremulous version.^[5] The calling is more frequent in November when the begin to breed. Most Nests are found from February to April.^[5] They also produce a single note hoot and a screech not unlike that of the Barn Owl. The nest is a tree hollow in which two to 3 white eggs are laid.^[2] They feed on palm squirrels, mice and other small mammals.^[3]

In culture

The eerie call has been associated with ill omen in some parts of Kerala. The call is interpreted as povaa-aa (="let us go" in Malayalam) and likened to a summons to the spirit world.^[6]

References

1. ^ BirdLife International (2009). "Strix ocellata". IUCN Red List of Threatened Species. Version 2009.2. International Union for Conservation of Nature. http://www.iucnredlist.org/apps/redlist/details/143243. Retrieved 26 February 2011. 
2. ^ ^{a b c} Ali, S and SD Ripley (1981). Handbook of the Birds of India and Pakistan. Volume 3 (2 ed.). pp. 304–307. 
3. ^ ^{a b} Blanford WT (1895). The Fauna of British India, Including Ceylon and Burma. Birds. Volume 3. Taylor and Francis, London. pp. 277–278. http://www.archive.org/stream/birdsindia03oaterich#page/277/mode/1up. 
4. ^ Baker, ECS (1927). The Fauna of British India, Including Ceylon and Burma. Birds. Volume 4 (2 ed.). Taylor and Francis, London. pp. 402–403. http://www.archive.org/stream/BakerFbiBirds4/BakerFBI4#page/n435/mode/1up. 
5. ^ ^{a b c d} Rasmussen PC & JC Anderton (2005). Birds of South Asia. The Ripley Guide. Volume 2. Smithsonian Institution and Lynx Edicions. p. 242. 
6. ^ Vijayaraghavan, B (1986). "Owl beliefs". Newsletter for Birdwatchers 38 (3): 54–55. http://www.archive.org/stream/NLBW38_3#page/n15/mode/1up. 

External links

• Calls and video recordings