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Hammerhead Fly

7mm | January 19, 2011 | Armonia Nature Preserve, Limon Province, Costa Rica

I spotted this little fly on the underside of a large leaf. I was really thrilled to find something so unusual. I probably spent about a half hour chasing it around from one perch to another. Luckily, it always flew just a short distance.

Dorsal view

I had heard of antler flies before, and I figured this was a good candidate to be one. Initial internet searches using that phrase didn’t turn up anything though. On a whim I tried searching for “hammerhead fly” since that seemed like an obvious common name for this fly. That turned out to be a good guess, and I found lots of similar looking images of Richardia telescopica in the family Richardiidae. I’ve been unable to eliminate the possibility of similar looking species. If not for that uncertainty, I’d have made this into an identification challenge. read more

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Richardiid Fly

6mm | January 19, 2011 | Armonia Nature Preserve, Limon Province, Costa Rica

I’m pretty sure this fly is a species in the family Richardiidae.

Dorsolateral view

It was really concentrating on mopping up whatever that blob is, allowing me to get several shots from various angles.

Dorsal view

Reference:

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