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fisherwr2 > Simple eyes located on top of this wasp's head, between the multi-faceted compound eyes. The next image shows their location a bit more clearly. The simple eyes cannot focus but do detect changes in light intensity, as occurs during sundown and sunup. This triggers the insect's activity patterns - eg some insects are active at night, while others, during the day. Note the sensory hairs just below the lens of each eye.
fisherwr2 > Male mayfly (Ephemeroptera) inside a petri dish displaying the bizarre head with huge white, nearly spherical compound eyes with thin black bands and a small black core. There are three stalked, simpler eyes in between that have somewhat of a mammalian appearance. These organs provide a means to effectively locate females. The compound eyes are white in the daytime and black at night. Mayfly adults have no functional mouthparts and don't feed. They live for only a day or two.
fisherwr2 > Mouth parts of a horsefly. Note the flat, amber, blade-like structures (upper right) that are used like scissors to penetrate and cut the skin to produce a pool of blood. The blood is then brought into the insect via the small parallel capillary channels located on the large yellow structure. The bite of a horsefly is usually more painful than a mosquito because more extensive skin damage is created by the fly compared to the more simple puncture of the small round mouthparts of a mosquito
fisherwr2 > Head of a horse fly (Diptera: Tabanidae)
fisherwr2 > Snout moth (Lepidoptera: Pyralidae)
Simple eyes located on top of this wasp's head, between the multi-faceted compound eyes. The next image shows their location a bit more clearly. The simple eyes cannot focus but do detect changes in light intensity, as occurs during sundown and sunup. This triggers the insect's activity patterns - eg some insects are active at night, while others, during the day. Note the sensory hairs just below the lens of each eye.
fisherwr2 > Simple eyes located on top of this wasp's head, between the multi-faceted compound eyes. The next image shows their location a bit more clearly. The simple eyes cannot focus but do detect changes in light intensity, as occurs during sundown and sunup. This triggers the insect's activity patterns - eg some insects are active at night, while others, during the day. Note the sensory hairs just below the lens of each eye.
Simple eyes located on top of this wasp's head, between the multi-faceted compound eyes. The next image shows their location a bit more clearly. The simple eyes cannot focus but do detect changes in light intensity, as occurs during sundown and sunup. This triggers the insect's activity patterns - eg some insects are active at night, while others, during the day. Note the sensory hairs just below the lens of each eye.
See photo in original gallery.
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