the author of this app says:
You're an entomologist who specializes in flies, which you affectionately refer to as diptera.
Your goal is to capture flies for your collection. But to get a good specimen, you need to capture the flies alive.
Easier said than done!
Flies start out with the screen to themselves. When you're ready, press the button to release the trap, reducing air space.
But be careful: if the trap hits a fly, the tiny insect will get knocked about, and flies can't take that!
To capture flies, release the trap repeatedly until the winged vermin have no more room to zip around. But be warned: as you close the trap, it gets more and more difficult to avoid hitting flies!
Now supports color on the Palm IIIc(tm) handheld.