Is the pollen grain inside the body? It is very strange, because syrphid fly should feed by liquid food. My be is pollen grain outside the body?
The covering of a pollen grain is thick and very resistant, I think, it is much more stable than an insect.
The pollen usually adheres to the body hairs of Syrphid fly. The pollen remains outside the insect body. I think so.
Dear Vitali,
This is a question of the mode of feeding. Many predatory or omnivorous insects like lacewings, ladybirds or syrphids feeds also on pollen. http://www.tandfonline.com/doi/pdf/10.1080/03014223.1976.9517924
So syrphid adults feed and ingest pollen but one can find always remains of pollen even some intact pollen grains in their hind gut or faeces. I mean I was clear.
Dear Vitalii,
Wäckers FL1, Romeis J, van Rijn P. Nectar and pollen feeding by insect herbivores and implications for multitrophic interactions.Annu Rev Entomol. 2007;52:301-23.
Read this article, it will give you some clue,
Regards,
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