♪ Wild Kratts ♪ Martin: On the South American continent, in the largest rainforest in the world, the Amazon.

We're here on the rainforest floor.

Chris: It's us, the Kratt Brothers.

Martin: I'm Martin.

Chris: I'm Chris.

A wet, humid rainforest is a great place to go looking for frogs.

Martin: So let's split up, spread out and see what we can find.

A frog!

Meet the giant broad-headed treefrog.

This is a big treefrog and look at that wide head.

This frog has amazing tree climbing powers.

Look at those feet.

See the suction pad tips?

Those are great for gripping while climbing.

Show us a jump climb.

(gasps) Amazing!

Chris: There's one.

Whoa...look at this awesome frog!

It's so colorful.

I love the bright green stripes.

Martin, check out this one.

Martin: Hey, I think this is from the dendrobates family.

This family is full of some of the most colorful frogs in the world.

Chris: Oh yeah, all different colors.

Blues, reds, oranges, yellows and greens.

Every color under the rainbow.

Martin: Hey, those lines really stand out.

Chris: And check it out.

It's got a little blue under its legs.

Underneath.

Martin: I like it.

I like this frog.

Chris: What an awesome dendrobates frog.

Martin: And what are those colors for?

Imagine if we could do what these frogs can do.

Chris: Imagine if we had the creature powers of the dendrobates frogs.

Martin/Chris: What if?

(upbeat music) ♪♪ ♪ On adventure with the coolest creatures ♪ ♪ From the oceans to the trees ♪ ♪ The Brothers Kratt are going places you never get to see ♪ ♪ Hanging with their creature friends ♪ ♪ Get ready, it's the hour ♪ ♪ We're gonna save some animals today with ♪ ♪ Creature Power ♪ ♪ Gonna go wild with Wild Kratts ♪ ♪ Gonna go wild, wild, Wild Kratts ♪ ♪ Gonna go wild with Wild Kratts ♪ ♪ Gonna go wild, wild, Wild ♪ ♪ Cheetah speed and lizard glide ♪ ♪ Falcon flight and lion pride ♪ ♪ Gonna go wild with Wild Kratts ♪ ♪ Gonna go wild, wild, Wild Kratts ♪ ♪ Gonna go wild with Wild Kratts ♪ ♪ Gonna go wild, wild, Wild Kratts ♪ ♪ Go wild, wild, Wild Kratts ♪ ♪♪ Chris: The Great Froggyback Ride Martin: Ah yeah, we have all the colors of that beautiful Amazon rainbow right here.

Aviva: Great!

Remember, all these transmitter chips need to be a different color.

Chris: So they can't all be blue Martin.

Martin: Aww.

Well, this one will be.

Koki: Why do you guys like blue and green so much anyway?

Chris: Green reminds me of nature.

All the forests, jungles, and grasslands where I love to be.

Martin: Blue is like the water and the sky and... my eyes.

And besides, blue is a primary color for paints.

Green is just a secondary color.

(laughing) Chris: Yeah, well green is better because it's a mix of two paint colors, yellow and blue.

That's way more interesting.

Martin: It's true, but you did use blue.

Chris: Right, but color is pretty complex.

When you're talking about light as opposed to paint, then green becomes a primary color.

Green and red light makes yellow.

Martin: So it comes down to this, all colors are cool.

Martin/Chris: Oh yeah!

Koki: Oh no!

Who splattered paint on this frog?

Jimmy Z: I didn't do that!

Martin/Chris: A Poison Frog!

Martin: He's fine.

That's just how they look.

They are so colorful.

Aviva: Wow!

He's beautiful.

Martin: Yeah, this one's called the cobalt poison frog.

Scientific name, dendrobates tinctorius.

There are so many different kinds of poison frogs.

All with their own brilliant colors.

Koki: Whoa.

Aviva: Ooh.

Jimmy Z: Wow.

Chris: Yup, all the colors of the rainbow.

Red, orange, yellow, green, blue, indigo, violet.

Jimmy Z: Hey, you did that without looking.

Chris: Yup.

ROYGBIV Jimmy Z: Say what?

Chris: ROYGBIV.

That's how I remember it.

Red, orange, yellow, green, blue indigo, violet.

ROYGBIV Jimmy Z: Cool.

Martin: That's what I'll name you.

ROY G. BIV.

First name, Roy.

Middle initial G. Last name, Biv.

Koki: Roy G. Biv.

I think he likes it.

Aviva: Ok. Dart shaft ready.

Just load the transmitter in here and we're ready to do some science.

Chris: Ok great.

In order to study the home range of squirrel monkeys, we need to get those transmitters onto... those monkeys.

Martin: Squirrel monkeys live in big groups that sometimes break off into smaller groups.

It can be kind of confusing.

If we can track them, we can try to understand them better.

Jimmy Z: But how do we get the transmitters onto the monkeys?

Chris: The research blow dart is the perfect method.

Aviva: Bulls-eye!

The special dart sticks harmlessly to the monkey's fur.

Koki: Now that little transmitter sends a signal to our tablet.

And we can see his movements on the map, even if we can't see him.

Jimmy Z: Awesome!

Let me get the next one with my yellow transmitter.

That one.

(ptooey) (zing) Uh-oh.

(zing) (boing, boing, boing) (hiss) Oh no!

(fwoosh) Chris: Look out!

(fwoosh) All: Whew!

Aaah!

Ooof!

Martin/Chris: (groan) (pfffffft) All: (oof!)

Martin: Hey, little monkey.

Oh no..no..no..no.

Little monkey, don't press that.. (click) No!

(zap) Chris: She miniaturized us!

(click) All: Oof.

Martin: Hey, hang on there.

That's not a toy.

Chris: Yeah, we really kind of need that, so don't even think about... running off with it!

All: Come baaack!

Martin: Oh no.

That monkey made off with our miniaturizer.

Aviva: If we don't get that miniaturizer back, we'll be mini-sized forever.

Martin: We got to catch up to that monkey.

Chris: Is the transmitter working Koki?

Koki: Yes.

At least we can track her movements.

Chris: Ok. We'll go after the miniaturizer.

Aviva: And Jimmy and I will hold down the fort.

Jimmy Z: I like that idea.

Aviva: Oh wow.

This place is so big and we're like ant-sized.

Jimmy Z: How're we going to get around in here?

Aviva: I don't know, but we got to try.

Hmmm..... Martin: Oh, hey Roy.

Chris: G. Koki: Biv.

(laughter) Martin: This is such a giant forest when you're such a small creature.

Isn't it Roy?

Chris: Yeah, Roy definitely has small creature experience.

Maybe we should stick with him.

Koki: Well, he is moving in the direction of the miniaturizer.

Martin: Oh, I wish we had a creature power suit.

Maybe Aviva can make us one?

Chris: Let's call her.

(ringing) (struggling) Aviva: Incoming call!

Hurry!

Jimmy Z: I'm hurrying!

Whew.

Hey!

Glad I left my old popsicle stick here.

Ok, get on.

Ready?

Aviva: Ready!

Whooaa!

(click) Tortuga here.

Chris: Aviva, we could really use a poison frog power suit.

Can you make one?

Aviva: What?

I'm mini.

We could barely answer this call!

Martin: We need a creature power boost.

We can't cover any ground here.

It's our only chance.

Aviva: Ok I'll try.

Just don't let Roy out of you're sight then.

Chris: We won't!

Martin: Follow that rainbow!

Aviva: Ok Jimmy.

Let's get to work.

Jimmy Z: Righteo.

But I'm going to need a snack.

Martin: Why are we stopping?

Chris: Whoa.

It's an ant crossing.

Martin: Amazing.

A snack for a poison frog.

How's that for a sticky-tongued, wide-mouthed attack?

Koki: Thanks Roy.

I did not want to get run over by an ant.

Martin/Chris: No!

Stop!

Martin: Don't touch him.

Chris: He has poison skin!

Koki: Poison skin?

Martin: Yeah that's why they're called poison frogs.

Some types of poison frogs have enough poison in their skin to kill 20,000 mice.

Koki: And we're much smaller than mouse size now.

Chris: Yeah, it's a great defense against predators.

Koki: I'll say.

But where does their poison come from?

Chris: From the food they eat.

Ants, termites, and millipedes have certain chemicals that the poison frogs collect in glands inside their bodies.

Martin: These glands concentrate the chemicals and produce the poison.

Koki: That means you'd better eat up Roy.

We don't want any predators to get you.

Aviva: Ok Jimmy, stretch that rubber band right across here.

This frog leg prototype is almost finished.

A little more.

They have a lot of stretchy, springy tendons built into their legs.

Jimmy Z: Aaaahhhh!

Whoaaaa!

(thud) Uh...I'm ok. Aviva: (sigh) It's a lot harder making a suit in mini.

I'm going to ask them to get me a DNA sample, some skin or slime, that would make it a lot easier.

Martin: Hey, where you going Roy?

Whoa!

You got to see this!

Chris: What?

Martin: It's a nest of unhatched tadpoles.

They must belong to Roy and his mate.

Chris: Cool!

And Roy has been guarding them ever since the eggs were laid.

That's one of his jobs.

(buzz croak) And making sure they stay nice and moist.

Koki: Hey, maybe we can take just a little dollop of that slime for Aviva's sample.

Martin: Yes, of course.

(beeping) Sending Aviva the scan.

(ding) She's got it!

Chris: Hey, the tadpoles.

They're moving!

Martin: They're beginning to hatch.

Koki: One's out!

Chris: Welcome to the world little tadpole.

Martin: Happy Birthday!

Oh wow, these tadpoles need names.

I'll name them after the colors of the rainbow.

You'll be Red.

Orange, yellow, green, blue, indigo, and...violet.

Koki: Um, what's going on here?

Chris: A froggyback ride!

Koki: A froggyback ride?

Chris: Kind of like a piggyback ride, but pigs don't carry their babies on their backs.

These frogs do!

Martin: We got to see where he's taking them.

Chris: The rest of you tadpoles wait here, ok?

Martin: Hurry, he's climbing!

Koki: They climb too?

Chris: I love these frogs!

Koki: I hope Aviva hurries with that suit.

Climbing mini-sized isn't going to be easy.

Aviva: With this slime sample analyzed... (grunt) my programming... (grunt) is almost complete!

And... print the disc!

It's... ready!

Bros, Koki...are you ready for some poison frog powers?

Chris: Definitely.

We can barely keep up with Roy.

Martin: He's fast.

Koki: That's for sure.

Aviva: Get set Jimmy!

Jimmy Z: Teleportation ready!

And...zap it.

Chris: Where's that disc?

There it is!

Can't lose it in the forest.

Got it!

Whew!

Good thing I'm the climbing brother.

Martin: Yeah and since you got it first, activate bro.

Chris: Insert poison frog power disc.

Touch frog, with glove.

And activate poison frog power!

(zap, crackle) Which cool color am I going to get?

Huh?

What...where're the cool colors?

Aviva, help!

Aviva: That's what happens when I'm rushed.

I got to work on that.

The poison isn't active either, remember you'd have to eat ants for that.

Chris: I'll pass.

But that's see what these frog legs can do!

Oh ho!

Whoa!

Wow, these legs can really launch you far!

Oh ho!

I love leaping with frog legs.

Martin: Cool leaps.

Koki: Yeah.

Hey look!

Roy's taking off.

Martin: Can you give us a lift?

Chris: All aboard for a froggyback ride!

Martin: Wait for us Roy!

(upbeat climbing music) ♪♪ Chris: Woo hoo!

We're high now.

Enjoying the ride?

Martin: Well, froggyback rides are pretty bouncy!

Koki: Whoa...and slipperry!

Martin: It's amazing that those tadpoles stick on so well.

Koki: Hey, looks like that monkey troop is close by.

Martin/Koki: (gasp) Koki: There's one!

Those monkey's eat small insects, lizards, and amphibians.

Roy, look out!

She sees him!

Oh, why is Roy so bright and easy to see?

Chris: Uh-oh.

Martin/Chris/Koki: Nooo!

(monkey squealing) Chris: Good one, Mom!

She's teaching him an important lesson of the forest.

Martin: Oh yeah, she's saying "Don't touch those bright, colorful frogs.

They're poisonous".

Koki: Amazing, so that's why they're colorful.

Chris: Yup.

A warning sign.

One that's bright, obvious, and easy to remember.

Martin: It's an awesome defense called Warning Coloration.

Koki: So if you're a poisonous frog, you want bright colors that'll stand out as a warning to predators.

Martin: Exactly, but if you don't have poison, you want to blend in and hide from predators.

Chris: Like my suit.

It doesn't have poison or colors so... (squealing) Martin/Chris/Koki: Uh-oh... so we're in trouble!

(fast-paced music) ♪♪ Martin: Hop Chris, hop!

Chris: I'm hopping!

(tense music) ♪♪ Martin: Aviva, come in.

Mayday, mayday!

We need color quick!

♪♪ Aviva: I'm working on the update.

(grunting) Martin: We don't even need the poison, just the color.

Chris: Yeah, just the color...the color!

Martin: If you can get the color working, we can fool the monkey.

They know that bright frogs are dangerous and they think they're poisonous even if we're not.

Chris: It's called mimicry.

Martin: Yeah, mimicry.

Aviva: Oh yeah.

Monarch butterflies are poisonous.

But viceroy butterflies aren't.

The viceroys just look like monarchs so that predators think they're poisonous.

Same with the non- venomous milk snake, who looks like the venomous coral snake.

Mimics!

Chris: Yeah, so just get us that color.

We need color!

Aviva: Ok, I'm hurrying... (tense music) ♪♪ Chris: Uh-oh.

We're cornered.

♪♪ Martin: This is not going to end well.

♪♪ Aviva: I think I got it.

Update suit!

Please work.

Chris: Yay!

I have color!

Aviva did it!

I have a yellow and green speckled body.

Awesome!

Martin: Oh, you look cool bro!

And just in time.

Way to go!

Koki: Now they'll leave Chris alone.

Chris: There's the monkey with the miniaturizer.

Martin: Wait, wait, wait, wait!

Can we have our miniaturizer back?

Koki: Please!

Martin/Chris: Ohhh Martin: Uh-oh.

Chris: Listen.

There's something in there.

Martin: Roy!

Chris: G!

Koki: Biv!

Chris: What're you doing in there?

All: (gasps) Wow!

Chris: These cool plants called bromeliads gather rainwater.

Martin: It's like a hidden mini swimming pool in the middle of the forest.

Look, little Red is going in.

Ho ho ho!

This is awesome!

A great little pool to grow up in.

Right Red?

Koki: So that's what the froggyback journey was all about?

To drop her off here?

Chris: That's right.

The tad- poles need water to develop in.

And check it out.

Mosquito larva.

Every pool is bound to have some kind of food in it.

Larva, algae, invertebrates.

Little snacks for tadpoles to live on.

So this is where Red will live until she grows legs, loses her tail, and transforms into a bright colorful frog, like Roy.

Aviva: Speaking of color, I've programmed the entire spectrum of poison frog colors into your suit.

Check it out.

Chris: Wow!

Martin: Whoa!

Martin/Koki: Awesome!

Martin: Look at the colors!

Koki: Hey guys, Roy's on the move again.

Chris: That's because he needs to find more pools for the rest of the tadpoles.

Martin: Orange, and the rest, will each get their own pool.

All: (gasp) Martin: It's her!

The monkey with the miniaturize.

Chris: Quick...hop on.

After her!

Oh no... she's getting away!

Martin: Go Chris go!

Use those leg powers!

Chris: Hold on.

This is it!

Chris: Yaaahh!

Martin/Chris/Koki: Whoaaaa!

Chris: Stuck the landing!

Martin: Quick into the fur.

Chris: I'm out of here!

Martin: Hey, I've got an idea.

Let's tickle her.

Koki: Why?

Martin: Maybe she'll drop the miniaturizer?

Martin/Koki: Tickle, tickle, tickle, tickle.

Koki: (gasps) Gross.

(squeaking) Martin/Koki: Tickle, tickle, tickle.

(gasp) Martin: Oh no.

She's asking to get groomed.

These monkeys are picking parasites!

Koki: Doesn't she know we're not parasites?

We're just ticklers.

(squeaking) This plan is backfiring!

Martin: Yeah, stay away from those monkey fingers!

Koki: I'm trying!

Chris: They're in trouble!

I got to do something.

Hey monkeys!

Check it out!

(techno tune) ♪♪ Woo hoo.

I can do all the colors that poison frogs come in.

(funky dance music) ♪♪ ♪♪ Hey and check it out.

♪♪ Blue and red make purple!

♪♪ Koki: Ok Martin, while Chris has them distracted, we can grab the miniaturizer.

Martin?

Martin: Oh yeah!

I love this beat.

♪♪ Koki: Martin!

Martin: Huh?

Whoa, sorry.

Chris: And rainbow colors!

ROYGBIV.

Red, orange, yellow, green, blue, indigo, violet.

♪♪ Woo hoo!

And that's the show.

Thank you very much!

Gotta leap!

Chris: Let's get... All: Big sized!

All: Yay!

Koki: We did it!

And we can't lose this again.

Aviva, you guys will be big-sized soon.

Aviva: Great job guys!

Chris: C'mon!

Aviva: Jimmy, they rescued the miniaturizer.

No more mini-sized!

Jimmy?

Jimmy Z: Over here Aviva.

(laughter) Giant popcorn bowl pit.

Being mini isn't all bad.

Delicious!

Chris: Well, that's Creature Mission Accomplished.

What an incredible froggyback adventure.

Martin: Yeah.

Thanks for leading the way Roy.

Chris: We couldn't have done it without you.

(buzz croak) Aviva: Yeah, we learned so much about poison frogs.

Jimmy Z: And about color and how it can be really important to some animals.

Martin: And, we got our miniaturizer back.

Koki: We even got a lot of data about monkey home ranges for our science study.

Martin: Ooh...hey and check out the poison frog pattern I made up.

(laughing) Jimmy Z: Oh that one is awesome.

Martin: Thanks.

Chris: Hey, and this is what it would look like on a frog.

Martin: So cool.

Aviva: It's beautiful.

Koki: Nice!

Jimmy Z: And a good pattern.

Here, can you do mine?

Chris: Ok. All: Oooooh... Aviva: Now mine!

All: Ahhh... (buzz croak) Chris: Poison frogs are awesome.

Martin: So is creature art.

Right Roy?

Chris: G... Koki: Biv.

All: (laughter) (buzz croak) Martin: So poison frogs come in all colors of the rainbow.

Chris: And those colors are part of a very cool defence.

Bright colors can be useful in the creature world for a variety of reasons, but many of the most colorful creatures happen to be poisonous.

Like the fire salamander.

And the monarch butterfly, which has a powerful toxin that makes predators sick.

So, why be colorful if you're poisonous?

Let's take a look at the family of poison frogs.

Like the three-striped poison frog.

Poison frogs come in all these colorful patterns because they're saying something.

They're not trying to camouflage, they're trying to say to predators, "hey, I'm poisonous, so back off.

Don't mess with me".

Martin: Poison frogs, they have different levels of poison.

The more colorful, the more poisonous.

This is Pratt's rocket frog isn't colorful, but he's still a little poisonous.

Just not as toxic as Dendrobates tinctorius, that comes in brilliant blue or multi colored, with yellow patterns on its back.

And then there's the blue jeans frog.

Which kind of looks like it's wearing blue jeans and a bright red shirt.

But one of the most toxic frogs is the golden poison frog from South America.

It's so toxic that even touching it could be fatal.

Now this one, if you touch, you'll get sick.

But this poison frog's not deadly to humans.

But they have one thing in common, where they get their poison.

Chris: These frogs get their poison from the food they eat.

They eat millipedes, termites and ants and there are different chemicals inside their prey's body that they concentrate in glands underneath their skin.

Those concentrated chemicals are what produces the poison in this frog's chemical defence.

Martin: And that is an amazing creature power.

Chris: So, check out all the different kinds of poison frogs, Martin: And pick out the species with your favorite colors and pattern.

Keep on creature adventuring.

Chris: We'll see you on the creature trail!

(show theme song) ♪♪ ♪♪ Chris: To find out mo re about cool animals, Martin: And collect your own Wild Kratt's creature powers, Chris: go to the Wild Kratt's website Martin: at pbskids.org Both: We'll see you there!