Lizard Facts

Do Lizards Have 20/20 Vision?

I think it would be interesting to see the world as every other creature does, if only for a fleeting moment!     So what do lizards see?

vmcvZHLB2ZOot3jVu0bYldPbo4t9zkFkzt91eASeXqqRHGK2DlKvNptwZO7tivqaunSOvq1IMgK_7hsgCiK7VguLoG4aIIWSmVApvjXDr99nBYOl35laFdQntXkAIpQpCdDZUs2mivmGrpHyijIu9TyJpTtNtWdpPr5hyS6DXKMdvvucnLvJWFuGv1n6cZjAPxXP8ff-I7CIPZQu7WQC

Well…. Lizard (including geckos) and turtle retinas contain multicolored oil droplets in their photoreceptors, so   they can perceive color.    The opsin proteins in the cones in the eye are “calibrated” to detect different wavelengths. In many species, this enables them to see into the higher wavelengths beyond the scope of unaided human vision: into the UV range.

Nocturnal reptiles usually have smaller eyes than diurnal ones, but relatively large pupillary and lens aperture and cornea. This improves their light-gathering ability, but at the same time reduces visual acuity.

Lizards can focus on near and far by squeezing or stretching their lenses, using the ciliary muscles and annular pads. Pupils dilate and contract in response to light. Nocturnal geckos like the tokay have a stenopaic pupil: contracts into a vertical slit composed of a linear array of dots. Some nocturnal lizards have slit pupils, others are round. Lizards, unlike other reptiles, have a choroid body, called the conus papillaris. Projecting out into the vitrious humor, it nourishes the cornea.

*Thank you    http://www.anapsid.org/sight.html

The spectrum of sunlight includes infrared, “visible light” (the colors we see in the rainbow) and ultraviolet light, which is subdivided into UVA, UVB and UVC.

UVA, is essential. Many reptiles have extremely good color vision. Humans have three types of retinal cone cells for color vision, and their brains combine the information from these cells and perceive the blend as a certain color. Most reptiles, however, have a fourth cone type, which responds to UVA. These reptiles see a much more colorful rainbow than humans do, which makes providing natural lighting quite a challenge. This extra color perception is especially important to many reptile species in recognizing others of their species and even food items.

Some nocturnal geckos lack the red-sensitive cone, but their green-sensitive cone also responds to red light; they can certainly see it. Studies have even shown that some use their cone types for color vision in light similar to dim moonlight. Thus it is possible that “moonlight blue” or “red night light” lamps, which usually are much brighter than moonlight, alter these animals’ view of the twilight world.lighting-2-500

Sunlight also has effects unrelated to conscious vision. A reptile’s eyes, and the parietal eye (third eye) in those species that have one, transmit information to other parts of its brain responsible for setting circadian (daily) and circannual (yearly) rhythms. There are even light-sensitive areas of the reptilian brain that respond directly to sunlight’s glow through the skull. The length of day and night, the sun’s position in the sky, and the intensity and amount of blue in sunlight all give precise information about the time of day and season of the year. In response, a reptile adjusts its activity levels, and daily and seasonal behaviors, such as its reproductive cycle and thermoregulation needs. Even nocturnal species govern their behavior by monitoring day and night from their daytime hiding places.

*Thank you   http://www.reptilesmagazine.com/Reptile-Health/Habitats-Care/Reptile-Lighting-Information/

…So what have we learned if the study and testing conclusions are accurate?

  1. Lizards do see colors.
  2. Most reptiles actually see a much more colorful rainbow than we!
  3. Most lizards have a parietal eye, known as the third eye, which is a photosensory organ.
  4. Also, their pupils dilate and contract, same as ours, to focus on things near or further away.
  5. I will further add to this by stating a lizard (specifically Bearded Dragons) close their eyes for 4 reasons:     a) You are overstimulating at the moment OR they don’t like you AND they want you to go away.    b) They are sleepy.    c) They are at this very moment, in perfect peace with their environment & existence.      d) They are feeling love from or toward you right now.
    dav
    “Yes, I can see very well with my cute eyes!”
    img_20191026_141532.jpg
    “I see Mommy has a lighting obsession.”
    mde
    “I see brother Dog is…being dogly.”

     

    20190818_203316.jpg
    “Mommy wonders how I see this double rainbow.”
    “Give me Lizardry or give me Death!” – ♥Dawn Renee
Uncategorized

“How Much Is That Murphy In The Window?”

20170522_185954

 

On more than one occasion, I have been offered cash for my lizard!! Lil’ Murph is not for sale!! He is not just gorgeous to look at, he is my friend! I’ll even bump it up a notch to liken him to my reptilian child.
Those that have seen the strange woman walking a dog and lizard may think she is just trying to get attention…. NO, my lizard should be able to experience walks under the sun as any creature & I simply do not care what the “civilization” thinks.
If they think my lizard is cool… well, that’s cool. If they choose to think I am strange, they can just…       go about their business as usual.
My lizard so enjoys to be walked!! He rests at my shoulder peacefully – UNTIL it’s time to go home – this boy knows the entire backyard area! It’s tricky work, especially at times like one particular day, when the dog was ready to go home and the mild adventure-seeking, free-spirited lizard was not.

dav

20180604_140709
Picture this a moment: Now, we’re in the old ally by the house, there is minimal traffic here at any time of the day or night. The dog’s leash is stretched in the homeward direction (I think the sweet boy gets dumber as our long, hot walks progress). He is ready for water & rest.

 

And so anyway… as I mentioned, Murph knows his backyard. He wants to walk more! Here is when peaceful observance of his world morphs (or Murph’s) into sheer rebellion!!      So what does he do?
He crawls down my body and heads the opposite direction of home, with his harness outstretched the other way of the dog’s…
Okay, Murph is plotting his path to descent in the desire to walk around on the Earth, so I decide now is the time, a safe distance from intersections, that I let him down & fix a wee issue. I take my shoe off because something got in it and has been annoying me. Well, the gravel is burning hot so  I hopped to the little strip of grass to address this problem.
I have to throw down the dog’s poo bags, immobilize the dog and the little rebel, tap stated shoe upside down, while seeing to it I dropped not the house key and what-not I took along on our journey (2 more hands would be beneficial at such a time).
As luck would have it, now is when a minivan chooses to navigate itself into the mess and in my way. I had to make the lady driver wait as I collected all obstacles from the path.           It happened thusly:
STEP 1) Immediately grab Murph & place him on my shoulder.
STEP 2) Retrace my hops back to the gravel to get poo bags & shoe.
STEP 3) Toss stated items to that grassy strip.
STEP 4) Look up while politely raising my finger to suggest “Please, give me a moment” and give a humbled grin.
STEP 5) Make way back to grass.
STEP 6) Secure Murph with one hand & not trip on the leash of his harness dangling before me.
STEP 7) Walk toward the dog as I reel him in with the retractable leash, I take a few steps forward and reel him back (& repeat a few times) toward myself, Murph, poo & that shoe.
STEP 8) Contemplate the peculiarity of such moments in my life as I amass what was scattered.

Did she smile at the unexpected, mildly comical scene of woe for me? Nope, nothing. I smiled, I waved, I said I was sorry. I think she avoided eye contact. So okay woman, you miserable soul, I retract my apology. I’m not sorry!
Oh well.
 There I stand, feeling like a character in Dr. Seuss book:
My shoe is off,  my foot is hot, I have a lizard I like to hold…  & so on.
And finally,
STEP 9) Travel the short distance home with everyone & everything while shaking my head about the odd situations in which I often find myself.
dav
part scorpion??
dav
“This is my adventure-seeking face!”

davdav

20171019_15280020171020_13562720171020_14195820170817_14383220170430_175633

20180221_113442“Give me Lizardry or give me Death!” – ♥ Dawn Renee

Uncategorized

“Mom Says We’re Moving, What is Vastu & Why Is It So Messed Up In Here?”

If you could see Lil’ Murph eyeballing the mountains of boxes, you’d agree he is thinking, in his way,  “What uh, what’s going on? This is all about to affect me & our lives here isn’t it?”

mde
Enter a caption

What you see here are boxes, clutter that’s making me crazy, and 2 exhausted darlings. Amidst the chaos, is a lizard covered with a tank top while resting his chin on his beloved 1960’s-ish chair, an oblivious dog is tired from being lazy all day (except for the walk he, Murph & I had), and I after a busy day, am brushing up on a decorating/designing book, because, well, why not? Yep, that’s life, currently.

  mdedav

“No, Mommy does not make a habit of burning a candle around me. She’s only momentarily being ridiculous. I might be concerned in what she’s reading because she already has a seeming addiction to accent lighting & decorating. See?’

sdr

“Mommy was a professional painter for many years & thought her wall paper stripping days were done. Our new home will be better, but needs a lot of interior, aesthetic changes. I’m tired from just thinking about watching her work.”

dav
“Mommy is outside with me as much as possible before she gets busy again.”
mde
“Brother Dog has no clue.”

We will painfully miss very special Squirrels, Starlings, the little Hoppities, as I call them, small birds that only hop, a particular Robin & George, the spider that is a long-time resident at the back door’s corner, following him are the newer neighbors: Penthouse George & 1st floor George.

These animals know me. They know my car, they know my voice, & they know we’re friends. It is painful to leave them. I want to leave a note for the new residents about whom likes what to eat & how they will know they’re  being serenaded to come outdoors with food.

Also, there are a few trees and plants very dear to me. One tree near the house has neat, visible roots. It seems magical.

Our new home has lovely plants around it. Another thing, it has high quality windows with a transferred  warranty, but there’s a problem. They’re too high from the floor. Murph’s enclosure, even upon it’s stand, will not reach the sun and breeze. There is a lovely glass-sliding door that will fix this temporarily until a wall portion gets knocked out and rebuilt with a proper window for my Murph. We will miss much about what has been home for so long. I hope we will all be happy where we’re going. I wish our trees, some people and our critter friends could go too.

 

“Give me Lizardry or give me Death!” – Dawn Renee♥