Couple of tiny flies sitting on the petals of a Trollius (giant buttercup) in my garden in Edinburgh. Can someone at least give me the family name please?
No interactions present.
Not just sitting there, but mating. I wonder if this could be significant because Trollius is a species that is pollinated by flies of the genus Chiastocheta that actually parasitize the flower. This is a very uncommon phenomenon, apart from figs which all have such a system.
Some populations of Trollius, including cultivars I suppose, are self-pollinated, but it would be fascinating if these flies are Chiastocheta.
Here is a blog post about this: http://ptyxis.blogspot.co.uk/2008_05_01_archive.html
University of Edinburgh and Biodiversity Observatory (OU)
Unfortunately (or fortunately, if you like your Dolis), these are definitely Long-legged flies of the Dolichopodidae, as John suggested, rather than Chiastocheta.
My Flickr photos...
Yeah, well I knew it was a long-shot. It would be great to have more information about the extent of this interaction in the UK. Its seems quite common in N.Europe. Is it under-recorded here, or just rare?
Thanks, John, Jonathan and Ophrys. I enjoyed reading around the possibility of Chiastocheta A fascinating dilemma for the plant - "if you pollinate my flowers you can eat some of the seeds (but not too many)"! But it seems unlikely that a population of Chiastocheta could survive dead-heading of the two or three plants in an Edinburgh garden. I can go with Dolichopodidae. Thanks. Colin
Lat/Lng: 55.9, -3.3
OS grid ref: NT2370