Animal Behavior - CrashCourse Biology #25
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- Опубліковано 7 лют 2025
- Hank and his cat Cameo help teach us about animal behavior and how we can discover why animals do the things they do.
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Vampire Bats regurgitating blood into the mouths of their comrades is somehow both heartwarming and terrifying. So thanks for that.
I bet when we shoot a bunch of bombs into the air because of an important date (July 4th) Dogs must have the same thought.
I have a Biology exam tomorrow and these videos are saving my life
D.N. K.
D.N. K. Gay
@@BeanDar why do you have to say that, it's just another comment on the internet.
@@cordless157 Look here bud, you better get back to your own stepping grounds. Mind your own turf
😂 That escalated real quick
the SciShow team also produces the CrashCourse Biology videos... we're the same people!
I can across your video on Turbo Feline Roadmap - there's many great videos there that will help out
*OK* , SciShoww.... Nobody asked you...
You can explain things in 10 min better than my ethology professor in few hours. Thank you :)
Hank, you are my new hero! I teach an animal studies class and I have only just discovered CrashCourse and I am in LOVE!! You make these topics exciting to learn about and easy to understand. I cannot thank you enough for sharing your wonderful brain with the world! :)
*I loved this episode!*
Thanks Hank and the producers, there really isn't much to find about Ethology on the net. I have an important project in school next week and this really saved me a lot of time.
Green's cat, not to be confused with Pavlov's dog.
I see what you did there
Through the whole video, I couldn't help thinking, "When does Cameo get a treat?"
You had me at: "My cat" :3 Also the fact that Crashcourse Biology is always fascinating BUT MOSTLY KITTY =^.^=
I've been in Hank's living room. It's like we're friends now.
D'awww... Lemon and Cameo are so dang adorable... The video was awesome as well.
Hank you are awesome. Great job with your Team on these videos. I appreciate your hard work in this crash course. Keep up the great work.
Taking this as a class in my next and final semester before earning a BS in Wildlife Conservation & Biology and this was a wonderful introduction / crash course. Thank you!
This was the first crashcourse episode I've watched and I just have to say that this is brilliant. Thank you very much.
fastest way to feel old on the internet. rewatching the first crash course video you saw lol.
Thank you to Cameo for making a cameo
Aw, Cameo. What a gorgeous cat!
Can't wait! I recently made a video about dreaming based on my own observations of earthlings. I wonder whether my hypotheses match with earthlings theories.
You make learning fun. I could literally listen to you all day. You rock...
There is a video on dreaming planned for the SciShow channel. Look for it there in September!
Your cat would make a great intro to random X inactivation and the tortoise shell / calico coat color!
Salaam to Hank Green. You are awesome teacher. One of my fav teacher. Thanks
A note on those South American vampire bats; they also exhibit tit-for-tat. In a somewhat cruel experiment, researched grabbed some bats leaving the nest and injected their sacs with air using a syringe and shoved them back in the nest. To their neighbors, these bats appeared to be engorged, having lots of blood to share, but this was only an illusion so the bat doesn't feed the other's babies. In return, the other mothers won't feed the babies of the bat perceived as not sharing with the others.
Angelina Rigsby Wow, that's fascinating!
What experiment is this please?
Just the visual of hamster skiddaling in preparation for boot knocking was the worth the price of admission to this video
Hi. Great video!
Although I have a couple of comments.
First - I would say that the 2 main tasks in an animals life is Survival and Reproduction, where finding food is but one part of survival. In fact, I would boil it down to just one: Reproduction, as all other behaviors ultimately serves reproduction, and without it, no other traits will be passed on.
Second. You make the same mistake as many of my students: mixing up Tinbergens question 3 ( adaptive value) and 4 (evolutionary history). Your explanation for question 4 is actually an answer to question 3. An answer to question 4 could be something like: "Pheromones are used by many types of mammals and is likely to have evolved long ago... however, the specific sex pheromone used by this hamster is unique for this species, thus it is a fairly recent modification to the smell, possibly as a means to avoid interbreeding with other hamster species". In other words: question 4 asks to what extent the behavior could be explained as a a phylogenetic "leftover" from evolution acting on ancestors.
/Andreas (Lecturer in Ethology and Behavioral Ecology)
The History (or Phylogeny) - question has to do with the evolutionary past of the animal. One example is goosebumps - there is probably no Function for this in humans. But seeing how animals with their fur intact use the same reflex to fluff their coat when chilly, shows that the History explanation is key to understanding why humans have this behaviour.
ok boomer
The way he acts with animals and insects is adorable LOL
Despite this being a very interesting episode, all I want to say is that Lemon and Cameo are so adorable
CATS ARE AWESOME!!! That's really all I need to say, the show is awesome but everybody here should already know that.
Chicks dig nerds that can dance? Ladies...
YES!!!!!!!!!!!!!!! Step 1: look good and step 2: know how to dance
Kyle Thum I'm 1 for 2, and it isn't the first one...
i'm mean, its not a lie so...
I'm so glad you made an animal behavior video.. I'm gonna major in this!
No, you can do anything you want, Marty, you are an awesome human being.
your dog is so cute! I paid attention tho, i promise! :)
Aw, Lemon and Cameo are so cute! :)
Thank youuuuu
Hank, I think you should talk about the relationships in which animals and plants need to live, a 'micro-world' if you will. especially those in the Galapagos islands and talk about how many external factors like the weather and sea temperatures play a crucial role in shaping said relationships.
If "animal behavior" is doing something that simply helps you survive and reproduce, then the definition of sentience is finding an activity more desirable than survival.
I'm so glad that I'm sentient.
A Cameo cameo! Those are the best!
Thanks Hank! You're a better teacher than my university lecturer
I LOVE YOUR CAT!!! you're officially my favorite person!!!!! love the show :)
Fantastic as always Hank!
What kind of cat is cameo? She is very fluffy :D
She is planning to eat hank
Been subscribed since episode one, but this is the first episode I've seen. It wasn't bad
You helped me so much on the AP bio exam. You don't even know.
So Thanks!
Hank, you're the reason i'm going to get a good grade in biology
It's a Cameo cameo! and a Lemon cameo!
Hey, why does my kitten chase her tail? I'm scared she's going to get hurt becomes sometimes she does it on stairs and then falls down them which is adorable, but worrying.
Canadian Geese! I live a stones throw from the lack in my city and there are so many of them. They are also really loud!
Aaaaah Lemon... I am feeling all the feels...
Lemon, we miss you!
I was saying he was "scratching" an itch. You can't Itch and itch. Some people say it but it is a very informal way of saying it.
OMG! You have a greyhound
This is really great. I'm doing an essay on ethology and this will help so much.
I would just like to state my appreciation for the increase in the cute animal quota.
Aah what to say.. Amazing videos.. Thanks a lot...
Thank you to Cameo for the cameo
Such a beautiful cat.
Interesting video that makes this area simple and relevant
Gracias por este excelente material de apoyo para docentes! que bueno poder trabajar en versiones subtituladas al español. Un abrazo desde Colombia
What an adorable kitty! XD
More videos with cats in them! More!
I really like your videos ❤️💎❤️💎❤️
Loving your video was very useful for my veterinary technician studies :) thanks!
Thanks for reminding me to feed my cat. Sometimes it's hard to tell if he's begging for some food or just being super affectionate because of how much he loves me. Now to wait a few minutes for him to barf up his tasty treats because he always eats too fast. *sigh*
Kudos to all the ladies promoting intelligence as an evolutionary trait!
Cameo is like my grandmother's late cat, Piika. Bless, she looked so much like Cameo... it's odd now since Piika's gone.
Cameo reminds me of my cat Misty. :) Both are adorable.
YES!!!! I study animal behavior for fun, so this was awesome!!!
Separate comment for this. Communication occurs where animals transfer information, not necessarily talking, humans also use body language, tone and writing as well as speech. Animal communication could be codified into a 'language' e.g. ground squirrel signals for different predators. If directed communication is required then animals will be physically able to, if not then they won't. It's not that they're stupid, just that they don't need to, we're not weak because we can't lift tree trunks.
Wow...used this guy in my GCSEs when he was at sci show and now im taking my animal behaviour at uni and he STILL is useful😂
Brennan Cattermole How are you doing in uní? Any advice? I’m thinking about the same pathway, but need advice and help because I’m still not exactly sure what to do.
Most dogs aren't latched in their crates very often, and there are a lot of benefits to having one. First, it gives the dog a place where they can go if they feel stressed. Second, it's a convenient place for a bed, which also ties in with making the animal feel comfortable. Thirdly, if there's an emergency or a dangerous situation, you can put them in their crate and latch them in there until everything's been dealt with. For instance, it's really useful if you need to clean up broken glass.
CAMEO IS SO CUTE I LOVE HER
I wish good luck to Hank
yaaaaaaaaaaaaaaaaay!! thank you so much for doing a video on behavior :)
Aw little Lemon in the background! :D Hallo, herpaderpapotomus!
HELL YES I DIG NERDS WHO CAN LEARN DANCES
Love Crash Course!
Thank you for making learning so interesting!
It's a Cameo cameo! :D
+Melinda Meyer =D
Regarding Bower Birds, many would argue that they do not collect garbage, but aggregate piles of trinkets with specific and unifying aesthetic characteristics. lol
Awesome Video and humorous.
1:12 Can we just accept the fact that the dog simply looks depressed
THIS IS EXCITING. HOW COME I DIDN'T KNOW CRASHCOURSE HAD AN ANIMAL BEHAVIOR VIDEO BEFORE? I am mad at myself now.
Yay ethology. I would have enjoyed a brief discussion of human behavior and what is and isn't adaptive but I appreciate the limitation of time. Maybe in another ep?
As a stop-gap until these videos are made, I may be able to help. There isn't much of a 'hive-mind' for the cooperative breeders such as the Hymenoptera (Bees, ants, and the like). If you're interested, look into the evolution of emergent behaviours. Each ant works to do what it's own impulses tell it to do and when you look at the colony it seems as though the whole thing is working together (Same thing with flocks of birds flying in unison). So yeah, emergent properties, not hive mind.
Yes, it does at some level. Of course we humans have a waaaaay more complex social environment and we developed symbolic language, but selection worked (and still woks) for us as it does for the other species.
Nature is awesome
his cat is da*n awesome!
Haha i cant remember :P
Thanks for this Hank, always been interesting to me, might do this module at uni :D
YOU HAVE REALLY COOL GRAPHICS
Thanks I'll look into that. There are behaviours in colonies, though, that lie outside self-interest and I think are unique to hives, aren't there? I'm thinking:
1) Responding to pheromones that other ants are under attack.
2) When they form this lattice of ants and somehow decide where they are going to make their next home.
3) How you can end up with the different roles the ants in a colony have
4) Bees dying to sting a threat
I'd also love to know what hive animals' non-hive ancestors were.
Another great vid. Thank you.
Somebody pointed this out on the Sci Show episode, and it's still true now. < this thing here means it's an INEQUALITY, not an equation. = this thing means it's an equation.
You should talk about connectomes!
Thank you!
I also knew a long-haired tortoiseshell called Cameo that deserved constant attention.
Let's just say if she finds a long-lost sister called Bloomer, Bloomer is gonna be pissed.
And that is why this word --> "Plasticity" has the word plastic in it. It means the ability for the brain to change. Certain brain structures produce certain actions. Ex: So if an animal has a small hippocampal region, it probably wont remember very well, so it would go off exploring, forget its way back, and die.
Yay Cameo!
Oh, sorry, I see how that sounded confusing. Radiation is the geographic spread and genetic divergence of a species into many lineages. Human radiation was very rapid (we went worldwide within 100,000 years), so we haven't had time to develop much genetic divergence. :)
Systems finally on next week!!!!!!!
Crash Course videos are pretty scheduled as to their content. I'd ask the SciShow channel about a Lucid Dreaming video
"The only two things that matter - eating and sex" is a rather sad statement...
My tennis coach abides by it
hasn't led me wrong yet!
A cat named Cameo? Total win