keyword pages: 1  
< 1 of 4 >
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 > View of the dorsal section of a wasp head showing the two kidney-shaped compound eyes, the three simple eyes in between the compound eyes, and the base of the antennae. Compound eyes are made up of hundreds or thousands of individual sections, each with its own lens and sensory cells. The eyes which wrap around the head from top to bottom allow the wasp to see above, to each side, the bottom, and to the front of it. The 3-dimensional nature of the eyes protruding from the surface of the head allow some site behind the insect. Compound eyes do not focus well, but the large number of individual units are excellent for picking up movement. The brain integrates all the visual input and makes "sense" of it and causes the insect to take the appropriate behavior. The simple eyes consist of one unit each and are designed to detect changes in light. They appear to be responsible for detecting changes in the daily photocycle (simple eyes are shown in greater detail in the previous image)
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 > Ventral view of an adult long-legged fly (Diptera: Dolichopodidae) showing huge eyes, mouth parts, and antennae. Many of these flies are a beautiful metallic blue and green color. The one in this image is about 7 mm in length
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.
keyword pages: 1  
< 1 of 4 >

Comments

|

New comment:

Name: Email: Link:


To foil spammers, enter this code: copy this text in this box: Code unreadable?

Add Comment Cancel