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Sheep bot fly
The sheep bot fly (Oestrus ovis) belongs to the genus Oestrus in the order Diptera and is the most common member of the subfamily Oestrinae, in the family of bot flies (Oestridae). The sheep bot fly originally came from the Palearctic eco-zone but is now found throughout the world.

The sheep bot fly reaches body lengths of 10-12 mm. The thorax is covered with thick golden fur. The abdomen is whitish-grey with black markings. The sheep bot fly has a broad head with large, reddish to brown compound eyes. The mouth tools are degenerate and allow only a small quantity of food to be ingested. The large, strong wings are brownish in colour. The legs are dark, hairy, and strong. The sheep bot fly is active in summer.

The females lay their eggs in the nostrils or eyes of sheep. The larvae hatch from their eggs inside the females and are shot into the host animals in drops of liquid. The host animals resist this. The laying of the maggots must be done quickly, otherwise the mother will be attacked by her own brood. The larvae, approximately 500 in number, nest in the nasal cavities and sinuses of the sheep, remaining there for months. In the spring of the following year, the host animalsalready show symptoms such as sneezing and inflammatory discharge.

The larvae are up to 30 mm in length. After the last larval stage, the larvae are sneezed or coughed out by the host animals and fall down to the soil in which they pupate. The sheep bot fly occasionally lays its larvae in humans, especially in the eyes.



Oestrus ovis
Common namesSheep Nasal Botfly, Sheep Bot Fly, Sheep nasal bot fly
German namesSchafbremse, Schafbiesfliege
Dutch namesSchapenhorzel
Danish namesFårets næsebremse
Finnish namesLampaannenänsaivartaja, Lampaan nenäsaivartaja, Lampaannenäsaivartaja
Swedish namesFårstyng
AuthorCarl von Linné (Carl Nilsson Linnæus), 1758
Distribution
Continents:

Eurasia
Europe
North Europe (British Isles (United Kingdom (Great Britain (England (South England (Southeast England (Sussex), Southwest England (Devonshire)))))), Scandinavia (Sweden, Denmark), Fennoscandia (Finland)), South Europe (Italy), West Europe (France, Benelux (Netherlands)), Central Europe (Czech Republic, Slovakia)
Asia
Far East (East Asia (Taiwan))
Oceania
Australasia
Australia (East Australia (New South Wales (New England (New England Tablelands), Nandewar, South West Slopes), Victoria, Queensland (Desert Uplands (Brigalow Belt South))), South Australia (South Eastern Highlands))
Polynesia
New Zealand, Hawaii
America
North America
Canada, USA
Africa
East Africa
Zimbabwe
Southern Africa
Republic South Africa


Ecozones: Nearctic

CountriesAustralia, Canada, Czech Republic, Denmark, Finland, France, Italy, Netherlands, New Zealand, Slovakia, Sweden, Taiwan, USA, United Kingdom, Zimbabwe
Links and ReferencesOestrus ovis in bie.ala.org.au
Oestrus ovis in faunaeur.org
Oestrus ovis in itis.gov
Oestrus ovis in dyntaxa.se
Oestrus ovis in Wikipedia (English)

Quick search: Sheep - Fly - Nasal - Oestrus - Flies - Wing
Maggots - Black - Insects - Larvae - Eyes - Family - Female - Maggot
Taxonomy
ClassInsecta
Insects, True insects
SubclassPterygota
Winged insects
InfraclassNeoptera
Wing-folding insects
SuperorderHolometabola
Holometabolous Insects
OrderDiptera
True flies, Mosquitoes, Gnats, Flies
SuborderBrachycera
Short-horned flies, Muscoid flies, Circular-seamed flies, Flies
InfraorderMuscomorpha
SectionSchizophora
SubsectionCalyptratae
Calyptrate muscoids
SuperfamilyOestroidea
FamilyOestridae
Bot flies, Warble flies, Heel flies, Gadflies, Botflies, Warble fly, Botfly, Bot-fly, Bott fly, Bot fly, Heel fly, Gadfly, Warbles
SubfamilyCephenemyiinae
TribeOestrini
GenusOestrus
Speciesovis
Oestrus ovis
Sheep Nasal Botfly, Sheep Bot Fly, Sheep nasal bot fly
AuthorLinnaeus, 1758
 
Synonyms
Oestrus argalis
Oestrus perplexus
Sheep Nasal
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Keywords
ABCDEFGHIJKLM
NOPQRSTUVWXYZ
German Flag Schafbremse
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Frequent Queries:
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