The Truth About Invasive Species | SciShow Compilation

While some invasive species are extremely harmful, did you know that despite their name, some invasive species are actually beneficial to the ecosystem? Join SciShow for an exciting compilation all about the world of invasive species. You might be surprised what you learn!

----------
----------
Huge thanks go to the following Patreon supporters for helping us keep SciShow free for everyone forever:

Bryan Cloer, Chris Peters, Matt Curls, Kevin Bealer, Jeffrey Mckishen, Jacob, Christopher R Boucher, Nazara, charles george, Christoph Schwanke, Ash, Silas Emrys, Eric Jensen, Adam Brainard, Piya Shedden, Alex Hackman, James Knight, GrowingViolet, Sam Lutfi, Alisa Sherbow, Jason A Saslow, Dr. Melvin Sanicas, Melida Williams, Tom Mosner

----------
Looking for SciShow elsewhere on the internet?
----------
Original Episodes:

[alyssam]

I've noticed that all of the scishow compilations get recommended a lot more by ~the algorithm~ lately. I imagine it's because the length is favorable at the moment. You guys are killing it right now the videos have been better than they've been in years imo.

[ledumpsterfire]

Interesting about worms. I knew hardly any of that.

The place I always bought bait from for fishing stopped selling the regular earthworms you get, and got a local supplier of native worms, which were fairly pricey.

All the cashier could say was, "I guess they're bad for the environment." Couldn't elaborate more than that. I thought they were being totally ridiculous, like it was a real life example of green-washing.

Evidently the owner was paying more attention than I was.

[shinyarchen_]

“Australia’s poster child for invasive species” is a title with a worrying amount of contenders.

[Empireo-]

There is invasive Hippos in Bolivia that Pablo Escobar raised in a zoo, but after his death, they run to the rivers and now are close to the amazon rainflorest. it's a great history to you guys cover.

[raeperonneau]

Collecting and killing cane toads is a sport in Queensland. They are everywhere (like the cover the road at night), super destructive, and unbelievably loud.

[madcoda]

Invasive species from Europe threatening American locals? I think I heard that before…

[robertgriffin]

The Corvid's in Australia have now learned to remove the poisonous parts of cane toads before they eat them...

[craftypam]

Aah, Hank, don't feel old because you can remember The Trouble with Tribbles. I'm at least 20 years older than you (maybe 30!), and I remember it!

[pumpkin]

I was today years old when I learned about this, I always thought that worms were just everywhere. And I grew up with people saying they are good and say that worms are normal in every place that has dirt.

[tristanmisja]

Torresian crows can also eat cane toads, but instead of being resistant to the poison, they learned to flip the toads on their back, so they can eat their insides from the belly, which isn't poisonous.

[jayteilhet]

I recently dug a trench for an ethernet cable, now I feel like an ass for saving all the earth worms I found

[ch-cd-ch]

we've got hogweed here in New Zealand and it ends up helping native forest more then hindering, most of the NZ native tree have a long growth period so need lots of shelter when they're young, so hogweed bunching up with their big leaves makes it dream for natives to grow and eventually take over
i grew up on a farm and there was a hillside covered in hogweed (though we called it whack-burn because you whack it and you get burns) and about 10 years later and there's no hogweed, just thick native bush

[cathipalmer]

Jeff Goldblum: Life always finds a way.
Marbled crayfish: Huh. Okay...

[mherrmann]

25:23 "two crabs enter, one crab leaves" the expression and how ya said it! Awesome! Lol

[.]

When you go out to nature but realize many of the plants are actually invasive.

[trishapellis]

Thanks for putting 'compilation' in the title right away! Have a comment for the Youtube algorithm.

[unseamingstew]

Imagine the sailor who was supposed to watch the rabbits and left the cage unlocked.

[Dragonite]

God I love Hank 😂😂😂 "and then kill it! Right there in the store"

[veigasterre]

"You're not old like me" had me 😂😂😂

[JoelReid]

Interestingly Cane toads have other indigenous predators that have adapted. Two come to mind that use intelligence. Both species i will mention seem to teach a learned behaviour to offspring, making it even more interesting. It is based upon the toxins on a cane toad being produced on the top of the toad, not the underside.

Marsupial river rats in the Kimberley will disable the toad by flipping it over, then uses a large claw to create a surgical slit in the belly to extract the liver, which it likes to eat... the problem is that the marsupial water rat only likes large toads, because they have large livers. thus the toads are slowly being naturally selected to be smaller. Marsupials rats tend to teach their offspring as they raise their offspring with them as they hunt.

The Australian Raven also uses intelligence to hunt toads. They once again flip them over and then eat them from the underside. As the Australian Raven lives in organised family groups, then this quickly spreads amongst family groups as a predatory style.