Hello, I recently got a Leucorchestris arenicola/Israeli Dancing Lady spider. It is nocturnal and does all of its fun stuff at night while sleeping during day time, so I was wondering if it can see red light. I know Tarantulas can't see the red spectrum, but I know some spiders can. My spider is from the Huntsman family which has super good vision, so I am wondering if they can see red light. If they cannot, then I will get one, but if they can, I won't. Thanks!
Can Huntsman/Leucorchestris see red light?
- Thread starter Faisal1
- Start date
- Joined
- Dec 8, 2006
- Messages
- 18,820
There’s a research article that MAY help you
- Joined
- Dec 8, 2006
- Messages
- 18,820
No- google does
SpookySpooder
"embiggened"
- Joined
- Jun 21, 2023
- Messages
- 1,086
Help the kid out. He hasn't yet mastered his Googlefu
Open wide! Here comes the nomnoms train~~
Choo~ Choooo~
- Joined
- Aug 8, 2005
- Messages
- 11,507
I'll give a 9 out of 10 for researching but you employed the scientific standard analysis backwards. You started with a working hypothesis then went looking for supporting theories.
Egghead professor stuff aside. your conclusion isn't correct. From salticid acute vision on down, spiders don't utilize eyesight as humans do, using continuous comparatives to form visual pictures of their surroundings. Comparing and differentiating colors and intensity. The spider eye on the other hand has a more simple motion detector like the intruder detector in your carport.
! The lenses of the eyes have a fixed focal distance, thus multiple eyes that expand the distances perceived.
! No iris. Their eyes cannot limit the photons they detect. Thus multiple eyes produce a 3D image of their immediate location relative to their evolved hunting ability.
! All the eyes contribute to their awareness of the immediate environment. Depending on which species the mono and stereoscopic vision produces a perceived awareness of the space around them.
! Then, depending on their hereditary traits, some spiders utilize setae to further enhance their field of awareness. Compare the setae of the lycosid or sparassid, extensive and sophisticated setae, to a web based spider such as latrodectus which has no need for eyesight or setae, instead utilizing the vibrations in the web to produce their field of awareness.
A textbook example of spider eyesight and reception function is observed in a salticid stalking it's prey. Motion detection noticed the prey and the spider moves towards it. Each time the spider moves it then pauses. It has lost 'sight' of the prey and has to wait for the next movement to redetect the location. The prey moves and the spider resets to location. If not in attack range the spider again relocates, again losing the location of the prey and again has to pause and wait for the next movement.
This is the reason why we often see a jumper near the prey which stands there immobile but the spider doesn't attack. If the fly undertakes a cleaning process of 'face' and forelegs or some minor other movement the spider resets the required coordinates and attacks.
Keep in mind the spider does not have the higher order brain functions to record an object as prey, triangulate location, and place it in an ongoing mental picture built in the temporary neuron-synapse recording function of it's brain. I forget the name of the part of the brain which acts like the RAM chips in the computer which temporarily retain data. And of course, very very limited hard drive data retention, be it spinning disks or SDRAMs, Static/Dynamic Random Access Memory - the modern solid state computer hard drives. Instead, spider data retention is by trial and error, slowly written into it's genetic code, often over several thousand iterations-generations.
Yuck, from photometrics to computer science to genetics in one swell foop.
Last edited: