
Narcissus fly
Merodon equestrisHey look, yet another bumblebee mimic! My attention was drawn to this fly by the sheer noise of it. Its buzzing flight was as loud as a
carpenter bee, with a sinister edge to the sound. I noticed it was a fly, and not one that was familiar to me. Fortunately it rested often, and occasionally stopped on the above
dandelion blossom to feed, so I was able to get a close look. It also got involved in noisy skirmishes with other flies of its own species and others.
I sent a picture to bugguide.net and the fly is tentatively identified as a narcissus bulb fly. I'm shortening it by one word even as I raise a skeptical eye at the identification. Narcissus flies are thought to have been introduced to North America from Europe through the commerce and transportation of bulbs of their larva's host plant. The adult is supposed to feed on the nectar of
Narcissus plants (what normal people call
daffodils) which have bloomed and gone a month ago already. Seems like bad timing for this fly to be active. Apparently they are also supposed to feed on plants in the genus
Lilium (tiger lilies and such) as well, and those are yet to bloom. I haven't read anything about these flies feeding on dandelion, but I sure did observe it happening.
Assuming that this is the right fly.
