A fly on a white background with extremely wide and narrow eye stalks, making the head as wide as the wingspan and longer than the body. It has wings with a thick, dark wavy line, and they are held out to the side of the body.

A fly on a white background with extremely wide and narrow eye stalks, looking at the camera. It looks like a pencil sitting across the face of a fly with an eye at each end.

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I mean, do I even need to explain why? 😂
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This is a male stalk-eyed #fly from Costa Rica. Females lack the hammerhead while males "compare sizes" for a chance to mate. Evolution is magical 🪄

#Ulidiidae: #Plagiocephalus
Collected by @flyliceresearch.bsky.social