Amadan's picture

Lunch-time

Observed: 7th August 2012 By: AmadanAmadan’s reputation in InvertebratesAmadan’s reputation in InvertebratesAmadan’s reputation in InvertebratesAmadan’s reputation in Invertebrates
DSC_2269
Description:

It is probably not possible to identify either fly or prey, but I wondered if anyone can say whether it has captured the victim, or is just scavenging another's "kill".
A nice spot for a picnic, either way!

Identifications
Species interactions

No interactions present.

Species with which Diptera interacts

Comments

Alan Thornhill's picture

The prey appears to have been

The prey appears to have been caught by a spider - it's wrapped in silk. Feeding on prey caught in spiders' webs has certainly been recorded before, but exactly what part of the prey it's feeding on one can only guess.

Amadan's picture

That is what I thought -

might be happening, but I've never seen or read about it before.
Thanks.

Alan Thornhill's picture

kleptoparasitism

It's a version of kleptoparasitism. If you google kleptoparasitism spider you'll find similar examples. But I was curious about how the fly is feeding because I doubt if it has piercing mouthparts.

Amadan's picture

Yes -

that puzzles me, too. I'd assumed it is a species with "sucking" rather than "biting" mouth-parts. Maybe it is just trying to see what it can "suck up": it certainly seems to be actively probing/feeding.