Behold—Poisonous Snakes! (Yes, You Read Why Echidnas Are Evolutionary Misfits 1 day ago   05:33

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While it’s true that most snakes aren’t considered poisonous, there definitely are poisonous snakes, with poison for their predators and venom for their prey.

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Sources:

https://www.science.org.au/curious/everything-else/poison-vs-venom
https://www.nationalgeographic.com/science/phenomena/2013/01/09/on-the-origin-of-venom/
https://www.unco.edu/nhs/biology/about-us/mackessy-stephen/documents/2014-ToxinReviews-Colubrid-venoms.pdf
http://snakesarelong.blogspot.com/2013/09/basics-of-snake-fangs.html
http://reptile-database.reptarium.cz/species?genus=Rhabdophis&species=tigrinus
https://www.researchgate.net/publication/225633210_Chemical_investigations_of_defensive_steroid_sequestration_by_the_Asian_snake_Rhabdophis_tigrinus
http://www.pnas.org/content/104/7/2265.short
https://www.researchgate.net/publication/226345711_Nuchal_glands_A_novel_defensive_system_in_snakes
http://www.bioone.org/doi/pdf/10.5358/hsj.35.53
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4407547/
https://link.springer.com/article/10.1023/B:JOEC.0000045585.77875.09
https://www.jstor.org/stable/pdf/1442023.pdf?seq=1#page_scan_tab_contents
http://www.bioone.org/doi/abs/10.3105/1345-5834%282008%2927%5B23%3ACETTKN%5D2.0.CO%3B2?journalCode=jche
https://www.sciencedirect.com/science/article/pii/S092966461200109X
https://www.jstage.jst.go.jp/article/mez/40/3/40_KJ00002641969/_article
https://www.researchgate.net/publication/283084352_Natural_history_note_on_a_new_defensive_behavior_observation_from_Rhabdophis_subminiatus_helleri
https://link.springer.com/article/10.1023/B:JOEC.0000045585.77875.09
https://www.mcglothlin.biol.vt.edu/cb2016.pdf

Images:

https://commons.wikimedia.org/wiki/File:Rhabdophis_tigrinus_IMG_6559.retouch.JPG
http://www.thinkstockphotos.com/image/stock-photo-rhabdophis-tigrinus/683240674/popup?sq=%20Rhabdophis/f=CPIHVX/s=DynamicRank
https://ufl.ae/videow/zpedgnrmQci
http://www.thinkstockphotos.com/image/stock-photo-western-diamondback-rattlesnake-striking-with/146062145/popup?sq=snake%20fangs/f=CPIHVX/s=DynamicRank
http://www.thinkstockphotos.com/image/stock-photo-female-boomslang-snake-in-botswana/696227832/popup?sq=boomslang%20fangs/f=CPIHVX/s=DynamicRank
https://ufl.ae/videow/IpvOOtpyL3a
http://www.thinkstockphotos.com/image/stock-photo-tiger-keelback-rhabdophis-tigrinus/469459904/popup?sq=keelback/f=CPIHVX/s=DynamicRank
https://ufl.ae/videow/7zktj8S-N0a
https://commons.wikimedia.org/wiki/File:Bufadienolide_skeletal.svg
http://www.thinkstockphotos.com/image/stock-photo-rhabdophis-himalayanus-rhabdophis-himalayanus/947821124/popup?sq=%20Rhabdophis/f=CPIHVX/s=DynamicRank
https://commons.wikimedia.org/wiki/File:Garter_Snake_(6869758932).jpg
Thumbnail: http://www.thinkstockphotos.com/image/stock-photo-tiger-keelback-rhabdophis-tigrinus/469459888/popup?sq=keelback/f=CPIHVX/s=DynamicRank
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Comments 1314 Comments

A_Flightless _Bird01
Im "that friend"
Paul Winchester
Thought this was a snake discovery (popular reptile channel) video based on the channel logo, then got excited that Hank Green was doing a collab with them... but nah. Still a cool video.
Chris Sargent
I’m that kind of friend after watching countless hours of Viperkeeper.
Professor Yog
a poison is a toxin is a poison is a toxin is a poison
Eric Zigmont
I have a false water cobra. Its mildly venomous.
Pierson Ellis
Very, very cool!
Matt Gonzalez
I'll save you some time. The Keelback is poisonous as well as venomous
Jen B
lol I'm "that friend"
Mr. Black
Im that friend. But so are most of my friends. We peer review each other which intellectual topics.
Acid Worms
well, now I know just how annoying I am when I go snake-nerd on people
Rune Anonymous
I didn’t know that some garter snakes were poisonous- I thought that their only defense was peeing. Is the pee a warning, or is it poisoned? What happens is you drink the urine a garter snake releases when threatened? I don’t even know if there’s anything poisonous for them to eat where I live- at least not animals. Plants and fungi, but no animals. And probably not any protists, either. I don’t even know if there’s any macroscopic protists where I live. I mean, I guess there’s algae? Are there any others than algae and slime mold that’re visible to the naked eye? Only animal with venom that is harmful to humans, and has a bite that can pierce skin, is the shrew. And wasps, if that’s venom? It doesn’t come from their mouths, but it is piercing?
Derpy Woodoo
I'd probably be that friend ._.
m0uz3r22
True most snakes are likely to not mess with us cuz of size. However I heard there are hostile or aggressive snakes. I mean ones that are territorial. I think just avoiding ones that are not in pet stores is probably just a safe bet.
Lainey Bug
01:29 - 01:34, slow it down to .5 playback, that snake is h💿l💿....
Alayne Sìdhe
I am that friend.
aws7778 7778
That snake's actually CUTE!
Addy Leigh
I'm that friend, but when somebody tries to tell me that there's no such thing as a poisonous snake I talk about this snake. I've been yelled at for saying there are poisonous snakes
AFishBicycle
I wish I had “that friend”...
I wish I had “a” friend...
ImDavid212
Wait so Fugo's stand?
Peeble Kitty
2:24
Also because it's dangerous to them. If the bitten predator reels back too fast it could toss them around and/or damage their teeth/fangs. They also reveal themselves when biting, ruining any camoflage they had been utilizing up until that point; hence why many snakes usually waits until they are SURE they're under attack before striking at a potential threat. Also, the predator could just get pissed at it and attack back.
So not only is it a waste of venom, it's also a huge risk to the snake.
In fact, some snakes, the Western Hognose being a prominent example, will bluff-strike (pretend to strike, but their mouths are actually closed) alongside tons of hissing and head-raising to scare off predator without paining them (this avoiding the danger of pain reflexes like reeling back) and without risking the safety of their hind fangs.
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Why Echidnas Are Evolutionary Misfits Behold—Poisonous Snakes! (Yes, You Read 1 day ago   06:37

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It’s pretty well known that Australia is home to some strange animals, but echidnas are especially weird evolutionary misfits.

Hosted by: Hank Green
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Sources:
http://www.nationalgeographic.com.au/animals/how-the-platypus-and-echidna-lost-their-stomachs.aspx
https://www.smithsonianmag.com/smart-news/many-animals-including-the-platypus-lost-their-stomachs-180948103/
http://phenomena.nationalgeographic.com/2013/12/03/how-the-platypus-and-a-quarter-of-fishes-lost-their-stomachs/
http://www.nationalgeographic.com.au/animals/echidna.aspx
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0006070#s1
http://www.publish.csiro.au/ZO/ZO09037
https://eprints.utas.edu.au/2320/1/Nicol_et_al._2007_The_life_history_of_an_egg-laying_mammal2C_the_echidna_Ecoscience.pdf
http://www.sciencedirect.com/science/article/pii/S0531556508001629
http://reptilepark.com.au/animals/mammals/echidna/
http://www.abc.net.au/science/articles/2011/01/11/3110568.htm
http://onlinelibrary.wiley.com/doi/10.1002/jcp.1040670108/abstract
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5399094/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2441467/
http://www.ucl.ac.uk/museums-static/obl4he/vertebratediversity/monotremes.html
http://www.jstor.org/stable/10.1086/522847?seq=2#page_scan_tab_contents
http://www.environment.nsw.gov.au/resources/nature/Factsheet3Echidnas.pdf
http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1591&context=hbspapers
https://www.researchgate.net/publication/290413985_Marsupial_and_Monotreme_Evolution_And_Biogeography

Image Sources:
https://commons.wikimedia.org/wiki/File:Heteropoda_venatoria_-_female_at_Mechode_Padur.jpg
https://commons.wikimedia.org/wiki/File:CSIRO_ScienceImage_10356_Superb_Lyrebird.jpg
https://commons.wikimedia.org/wiki/File:Monotreme_reproductive_organs.png

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