Dioctria's picture

Fever Fly

Observed: 14th May 2010 By: DioctriaDioctria’s reputation in InvertebratesDioctria’s reputation in InvertebratesDioctria’s reputation in InvertebratesDioctria’s reputation in InvertebratesDioctria’s reputation in Invertebrates
20100514_SX20_00638a.jpg
Description:
Identifications
Species interactions

No interactions present.

Species with which Fever Fly (Dilophus febrilis) interacts

Comments

Dioctria's picture

Thanks

Thanks for that Martin. Must be honest, I didn't realise we had others in this genus. What are the diagnostic features I should be looking out for? (That was the best view I got of the spines.)

David

Syrphus's picture

The start point is whether

The start point is whether there are 4 spines or fewer across the *middle* of the front tibia. If 2-3 it is febrilis or the very rare bispinosus. If 4, it will be femoratus or humeralis.

However, as this is a female with apparently a black body and legs, febrilis seems the front-runner. D. bispinosus is brownish, femoratus and humeralis have red on the legs and sides.

Murdo

TRY

recording wildlife with The Recorder's Year on www.hbrg.org.uk/TRY.html.

Dioctria's picture

Thanks

Thanks Murdo, that's useful. It sounds like detailed photos are the order of the day! :-)

David

ophrys's picture

febrilis

Apologies for coming to this late. Surely this is febrilis, isn't it? The other three species in the UK are different in the female, as Murdo said above. The obvious dark, smoky wings with pale tip is a character not shared with any of the other three, especially in combination with black legs.

Ian
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