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