I took some close up pictures of hover flies on thistles - my approach scared them off - but when they settled I took a flash picture and they did not react. I took several, in fact, and they didn't seem bothered at all.
2006-08-09 03:36:08 · 4 answers · asked by JeckJeck 5 in Science & Mathematics ➔ Biology
Flies eyes, like most eyes including our own, are designed to be most sensitive to catching movement.
Visual cortex is also sensitised to movement and has very direct connections with motor functions.
Flies will detect your stealthy approach, because you are moving and their visual cortex (or the fly equivalent) reacts instinctively to movement = threat =flee (not flea, Ha!Ha!). A camera flash does not involve movement and so is seen but 'ignored'.
2006-08-09 03:57:20 · answer #1 · answered by narkypoon 3 · 1⤊ 0⤋
They filter out excess light.
2006-08-09 03:47:08 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋
Ask them and see what they say.
2006-08-09 03:40:00 · answer #3 · answered by Bob The Builder 5 · 0⤊ 0⤋
because they have plash sights
2006-08-12 18:14:59 · answer #4 · answered by Anonymous · 0⤊ 0⤋