Genady Posted February 28, 2023 Posted February 28, 2023 Both predators and prey commonly camouflage by blending with a background using shapes, colors, and textures. It is relatively easy to do when the background is busy, more difficult when it is barren. This seahorse pretends to be a part of or a growth on an underwater cable. 1
sethoflagos Posted February 28, 2023 Posted February 28, 2023 The Nightjar family are all pretty cryptic. Here's three from Nigeria. Long-tailed Nightjar - Caprimulgus climacurus sclateri Standard-winged Nightjar - Macrodypteryx longipennis Plain Nightjar (cinnamon form) - Caprimulgus inornatus
Moontanman Posted February 28, 2023 Posted February 28, 2023 The cephalopods are world champions of camouflage some of them being able to instantly disappear in almost any environment.
Luke11098 Posted March 2, 2023 Posted March 2, 2023 I am amazed at what creatures live. Most of us have no idea yet.
joigus Posted March 3, 2023 Posted March 3, 2023 Owls are amazing in this particular department. http://www.instantshift.com/2014/12/12/hidden-camouflage-owls/ 1
Peterkin Posted March 7, 2023 Posted March 7, 2023 Aha! It's the straight branch! https://wpi.digication.com/honey-stealing-moths-BB2050-D20/home The death's head hawkmoth doesn't just look like bees; it smells like a bee. I just saw it today in a beautiful documentary (middle-school level) https://www.youtube.com/watch?v=10JTbfSecC4 1
MigL Posted March 7, 2023 Posted March 7, 2023 I know I have bad eyesight, but, other than Seth's pictures ( only the 2nd and 3rd ), I couldn't spot any of them. I'd make a terrible predator, and starve to death ...
Peterkin Posted March 7, 2023 Posted March 7, 2023 Good, aren't they? Nature tries everything, until something works really well, then leaves it alone for a few million years.
Genady Posted March 7, 2023 Author Posted March 7, 2023 3 hours ago, Peterkin said: The death's head hawkmoth doesn't just look like bees; it smells like a bee. Makes sense. Chemical camouflage to hide from creatures that sense the world mostly chemically. Visual camouflage to hide from creatures that sense the world mostly visually. Audio camouflage anybody?
Phi for All Posted March 7, 2023 Posted March 7, 2023 8 minutes ago, Genady said: Audio camouflage anybody? Moths have some audio camouflage. Besides active jamming sounds, fuzzy wings can make it passively difficult for bats to find them. https://www.floridamuseum.ufl.edu/science/researcher-receives-grant-to-study-echolocation-in-moths/ Quote Previous research shows other moths use sonar defense against bat predators by “jamming” the bats’ echolocation with a sound that confuses them. Based on the fossil record, interaction between moths and bats dates back at least 50 million years and researchers hope to understand how their coexistence may have affected their evolution, including the development of ears in hawkmoths, which are found in their mouths. Hawkmoths make sounds using their genitals and another aspect of the project will address preliminary evidence they use this form of communication in mating. 1
StringJunky Posted March 8, 2023 Posted March 8, 2023 1 hour ago, Phi for All said: Moths have some audio camouflage. Besides active jamming sounds, fuzzy wings can make it passively difficult for bats to find them. https://www.floridamuseum.ufl.edu/science/researcher-receives-grant-to-study-echolocation-in-moths/ Look forward to seeing the 2040 ultra-stealthed furry-winged variation of the F35 fighter. 1
sethoflagos Posted March 8, 2023 Posted March 8, 2023 11 hours ago, MigL said: I know I have bad eyesight, but, other than Seth's pictures ( only the 2nd and 3rd ), I couldn't spot any of them. I'd make a terrible predator, and starve to death ... In my defence, I would suggest that there is a certain selection bias at play. I tend not to photograph those individuals I didn't notice. 1
Genady Posted May 8, 2023 Author Posted May 8, 2023 (edited) Took a picture of a resting hummingbird yesterday: Only after enlarging it at home and looking carefully, noticed a lizard resting nearby: Edited May 8, 2023 by Genady 1
Saber Posted June 23, 2023 Posted June 23, 2023 The main reason a lot of animals both terrestrial And marine............ Have white or @ least light colored belly's is that many animals are color blind and thus see only a grayscale of other things......... And when the light source of nature is always from above....... the under side of animals... tend to be in shadow.....and seen darker......than their backs so they have evolved like that so the light shaded bellys cancel their darkness because their in the shadow under the animals body.......and other animals attentions as less likely to be drawn to them As you know if it was not like that the difference in the shade between their backs & bellys would catch eyes.......
Genady Posted June 23, 2023 Author Posted June 23, 2023 22 minutes ago, Saber said: The main reason a lot of animals ... 1. How can one test this hypothesis? 23 minutes ago, Saber said: many animals are color blind 2. Is it a fact? How many is "many"?
Saber Posted June 23, 2023 Posted June 23, 2023 (edited) 19 minutes ago, Genady said: 1. How can one test this hypothesis? Test what ? test that their bellys are lighter than their backs ? or are you asking about the colorblindness ? 19 minutes ago, Genady said: 2. Is it a fact? How many is "many"? If you go research about it i think that a lot by a lot i mean more that 50-60% of vertabrates species are .........Except primates & a lot of birds....they mainly can see colors...... Edited June 23, 2023 by Saber
swansont Posted June 23, 2023 Posted June 23, 2023 49 minutes ago, Saber said: Have white or @ least light colored belly's is that many animals are color blind and thus see only a grayscale of other things......... Color blind doesn’t mean grayscale. “In all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors. Cats and dogs have two kinds of cones, which are sensitive to blue and green light. This means they have a useful level of colour vision. The level of colour vision in other animals depends on the presence and types of the cones.” https://www.vetwest.com.au/pet-library/can-animals-see-colour/#:~:text=Only one animal cannot see in colour&text=The only animal that has,no cones in its eyes. Also: “The only animal that has been confirmed to see only in black and white is a fish called a Skate. This is because it has no cones in its eyes.”
Genady Posted June 23, 2023 Author Posted June 23, 2023 9 minutes ago, Saber said: Test what ? Test this explanation of why they have white/light belly. "cancel their darkness because their in the shadow under the animals body" etc. BTW, fish do not have "their shadow under their body." 10 minutes ago, Saber said: If you go research about it i think that a lot by a lot i mean more that 50-60% of vertabrates species are .........Except primates & a lot of birds....they mainly can see colors...... I don't think it is so. Did you do that research? Do you have a reference to such a research?
Saber Posted June 23, 2023 Posted June 23, 2023 12 minutes ago, swansont said: Color blind doesn’t mean grayscale. “In all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors. Cats and dogs have two kinds of cones, which are sensitive to blue and green light. This means they have a useful level of colour vision. The level of colour vision in other animals depends on the presence and types of the cones.” https://www.vetwest.com.au/pet-library/can-animals-see-colour/#:~:text=Only one animal cannot see in colour&text=The only animal that has,no cones in its eyes. Also: “The only animal that has been confirmed to see only in black and white is a fish called a Skate. This is because it has no cones in its eyes.” Thanx 9 minutes ago, Genady said: BTW, fish do not have "their shadow under their body." I ddint mean the shadow cast on the ground i meant the part of the body thats in shadow ( the under side of the animal ) 12 minutes ago, Genady said: I don't think it is so. Did you do that research? Do you have a reference to such a research? https://en.wikipedia.org/wiki/Evolution_of_color_vision https://www.colormatters.com/color-matters-for-kids/how-animals-see-color 17 minutes ago, Genady said: Test this explanation of why they have white/light belly. "cancel their darkness because their in the shadow under the animals body" etc. Its called counter shading Its also used in military camouflage.........
Genady Posted June 23, 2023 Author Posted June 23, 2023 (edited) 1 hour ago, Saber said: Thanx I ddint mean the shadow cast on the ground i meant the part of the body thats in shadow ( the under side of the animal ) https://en.wikipedia.org/wiki/Evolution_of_color_vision https://www.colormatters.com/color-matters-for-kids/how-animals-see-color The second link, I don't trust. It is too simplified, for kids. The first link, I didn't see there anything about "more than 50-60% of vertabrates species are .........Except primates & a lot of birds....they mainly can see colors......" In fact, many years ago I studied biology, and got Master Degree (M.Sc.) in biology. One of my favorite courses was Animal Behavior, which I passed with A+. I remember well from that course that most, almost all animals have color vision. Usually, it is different from us, but they do have it. Some see fewer colors than us, some see more colors than us, most see different color than us. Regarding the first question, how one can support your explanation of why some animals have white/light belly? You didn't give any answer to it. Edited June 23, 2023 by Genady
Genady Posted June 23, 2023 Author Posted June 23, 2023 1 hour ago, Saber said: Its called counter shading I understand this explanation. What I am asking is, how can we know that this is WHY they have it. Maybe there is another reason? Maybe there are several different reasons? We know why engineers use this counter shading; we can just ask them. But how do we know, why this feature evolved in animals? BTW, the textbook explanation for sharks, for example, is somewhat different from yours. They say, that when other fish look at the shark from below, the shark is less visible because they see shark's light belly on the light surface background. When they look at the shark from above, the shark is less visible because they see shark's dark top on the dark bottom background.
Saber Posted June 23, 2023 Posted June 23, 2023 54 minutes ago, Genady said: The second link, I don't trust. It is too simplified, for kids. Its simplified not lie ified or wrongified 54 minutes ago, Genady said: The first link, I didn't see there anything about "more than 50-60% of vertabrates species are .........Except primates & a lot of birds....they mainly can see colors...... Today, most mammals possess dichromatic vision, corresponding to protanopia red–green color blindness 54 minutes ago, Genady said: 15 minutes ago, Genady said: I understand this explanation. What I am asking is, how can we know that this is WHY they have it. i like to say it and talk about my point of view on the evolution and was waiting to discuss this thing in another topic i had questions about evolution like the one i had in the Eyes & Ears topic but im really afraid to ask them because when i ask some questions you people think im saying ( this thing i think is absolutely right and i dont accept any other theories to alter my view ) i had a lot of other questions about evolution but im really held back my the attitude of some users here i prefer not to open up and ask them .........as i have learn in my short stay here even asking things that other people dont agree would make some trouble for me ...... Oh by the way If i said this.... : The second link, I don't trust. It is too simplified I would not be treated very nicely as people telling me its a scientific site not a place to your personal thoughts.....🥲 Right now i saw Mr swansont has gave me this... ...for a clip that i mentioned kindly if you ignored the first couple of seconds....and it was talking about what i wrote about but i have to bear a penalty that never expires........but they insisnt on giving me an unexpirable penalty ...........eitherwise.......... And here you just have a topic that says examples of camo. and i wrote what i thought is a nice example........you keep saying why you talk with out evidence......... And i suggest you to read a little about countershading ........... And the answer is no.............i have A+ in biology.......what do i have to do with you A+ man ? you said evidence i gave evidence.........You say examples of camo i gave my Example........... You know what i dont really a have a strong and stable mental state and think ill better leave here before the repellent atmosphere here makes my situation worse......... I learn a lot of things in my short stay here.............thanx to all people who helped me know more........... Oh the last word i still cant forgive you for thikning im a flat earther in this topic......even though i said man i maybe an idiot in relation to people who have A+ 's and have studied in good universities of the first world countries.......... but im really not that dumb to be a flat earther........ But people insisted on that i was wrong and im trying to prove the globe isnt a sphere........ You people * not all of you but most of you dont even listen to the questions people ask you ............ * in my short stay here ill give the credit for the user with best manners & attitude to Mr or Mrs. Studiot ....try to learn from him/her
Genady Posted June 23, 2023 Author Posted June 23, 2023 10 minutes ago, Saber said: about my point of view on the evolution But I did not ask about any point of view on evolution. I ask a question related to scientific method. Given a hypothesis, "animals have counter shading because it balances their light reflection and makes them less visible," what test or tests could support or refute this hypothesis?
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