koki? you there? hmm, nothing. aviva? koki? aviva? koki? aviva? koki?e you so surprised? i'm... i'm not surprised. i'm freaked out! what is that thing? ah! gross. gross. don't move. it looks hungry. she tastes way better than me. hmm? sorry. ah! ah! aviva? koki? hmm? i hear termites. i'm lucky i found you, because unlike the aardwolf, you bat-eared foxes have the digging power to get into these underground nests. (grunting) help me! tiny voices! we're close! aviva! koki! we're on our way! yes! fox martin to the rescue! will you stop finding me! oh, i thought you were them! i thought i found koki and aviva. nope. it's me. and time is running out now. the longer it takes to find them-- the longer they're out there in the middle of this war between the termites and the tongues. we've got to step it up, dude. check this out: wings! some termites have them to disperse and start new colonies. and it's time for me to search a different species: one whose nests you can't bust into, even with fox paws. and i'll keep searching the ground nests. hey, i'm on a roll

(howling) koki: wild kratts, where are you? (howling) oh, hey koki.y're really dangerous but they're actually pretty wary of people. wow, but that howling is pretty spooky. wolves howl to talk to each other. they're saying, "here i am. this area is my home my territory." (howling) let's follow that... whoa! gah! (continues talking, muffled) whoa, cool! an abandoned raccoon den! this must have been a great den. it's big, hidden and- martin: chris! chris? hey bro. chris, you all right?! ya, i'm fine. just checking out this old raccoon den i found. uh, looks like you won't need a costume for the party tonight. you could go as a raccoon now. hmm, not bad. raccoons are nocturnal creatures. good point, dude, but let's go find that wolf pack! time for a little kickin' kangaroo gaming. huh? where's it...? (whimpering) koki? aviva? is that you? (whimpering) not funny! you can come out now. ♪ martin: wolf tracks! they must be close. martin, over here. oh yeah, it's the wolf pack. (snarling) and check those two out. they must be the alpha pair. basically, the to

hmm, so koki could be right. koki: whoo! oh, yeah! martin: not so fast. look at this. have leaves up high where no one else can reach them. right, necktie? whoa! a purple puncture-proof tongue that wraps around thorny branches and strips the leaves right off. cool. awesome. aviva, are you getting this? it looks like our experiment just proved that you're right too. aren't you going to celebrate? oh, yeah. that's great. giraffes are so cool. that long neck? martin, you're lucky. (laughing nervously) i wish i had one. right, guys? mm-hm. mm-hm. wait a second. oof. why are you guys acting so weird? well, i... well, i think you might be in giraffe mode forever. (both gasping) forever? forever? sorry. (groaning) what happened now? your creature power suit's gone. it just disap-- my power suit? gone? you mean no more cheetah racing power no more kangaroo jumping power nothing? yeah, and no more deactivation module. so martin's stuck in giraffe mode. forever? forever. everything just keeps disappearing. it's like there's some kind of black hole. i mean i never lose things. i'

koki: ooh, i'm going to get you, chris! enjoy the ride!e still trying to understand. and we're here with our friend kel from the dolphin communication project, who's trying to make sense of the dolphins' clicks, whistles, and body postures. all set, kel? hydrophones are set. they'll record everything the dolphins say. all right, let's go! (clicking) chris: up there! one dolphin touching the other with his fin! that's fin rubbing, a sign of affection between two dolphins. those guys must be pals. martin: kel and her team have put together a picture database of the dolphins, and can tell who's who by their different spot patterns and scars. that, plus the hydrophone recordings are used to understand what the dolphin sounds mean. scientists have identified about 200 different sounds so far-- sounds that mean things like "danger," or "come on, this way," or, of course, there's always, "let's play!" (clicking) chris: it's fascinating that some scientists now believe that dolphins have their own signature whistles and clicks, or names. i'm going

but look at it this way, koki. it's how nature works.y. they're the easiest to catch. ow, i'm so injured. huh? uh-oh, it worked! but on a different predator. a python's got a hug on me! pythons are constricting snakes. that means they squeeze their prey until they can't breathe anymore. this wasn't, ugh, exactly... the plan but i'll take it. could you please press that button for me? that's the one! yes, i'm a python! wait a second. no animal eats adult pythons. i'm at the top of the food web! whoo-hoo! aviva: not so fast, chris. we're checking something. chris: what? yep, it's right here. it almost never happens, but big adult pythons are sometimes caught and eaten by a super-hungry lion or leopard. you mean, kind of like that? (hissing) whoa, you've got to be pretty hungry to tangle with a python. whoa, not this time. catching food can be dangerous business for predators too. prey defends itself, and getting a meal isn't always easy. so, it's official. it's rare but leopards and lions will tangle with an adult python, if they're desper

koki: no, jimmy!specialized to eat: pizza. (laughing) bro, we should probably take a break and eat something to keep up our strength. looks like koala balloon agrees with you, dude. he's hungry too. oh, that's not a koala's kind of leaf. he's a picky eater. yeah, koalas only eat eucalyptus leaves. and they don't grow in the desert. wait a minute! my survival pack! i've got all kinds of leaves in there! what? why? because i'm martin kratt well-prepared creature adventurer. ah. all right. oak leaves! mango leaves! fig leaves! but no eucalyptus leaves. oh, wait i have eucalyptus oil, and our sandwiches. but what about koala balloon? he's got nothing to eat. then what's he chewing? yep, it's a eucalyptus leaf. wait! koalas have a pouch in their mouth to store food when they need to move to a safer location. he brought a snack with him! now we can all have lunch together. koala balloon! koala balloon. he's cute, but he sure knows how to put the sand in sandwich. ugh. i've heard of crunchy peanut butter but

aviva and koki have the invention garage so well booby trapped. our adventure gear collection. now, move around, martin! (straining) suction is not the answer. i can't get the suction to un-suck! huh! suction works for the octopus in the water because they can release the power of the suction by letting a little more water in. but that doesn't work in the air. if the suction is too strong it can't be released. huh, it's not good for walking on smooth dry surfaces. martin: need a little help here. you little show off! gotta come up with a plan. hang on bro! ha ha. very funny. that was a good one. look at those wild rats. inventing stuff in their turtle ship thing. i could invent anything better than them. for example, i could've invented that wild kratts miniaturizer. easily. so it really should be mine. hmm, how about an invention raid? keep an eye on the turtle ship and wake me if those wild rats turn their alarm off. (whistling) huh? okay, ready. now i just have to overpower the suction. (straining and grunting) (straining and grunting continues

chris: it's okay, koki. she's heading back to deeper water.. martin: there is still so much for us to learn to understand them better. chris: but using radio telemetry, scientists are beginning to discover new things about great white sharks like how they take massive journeys across entire oceans during their lifetime. martin: these lemon sharks on the other hand, we know a lot more about thanks to the work of our friend, dr. gruber and his team. hey, doc. all right. chris: dr. gruber has spent decades here in the bahamas studying the life cycle of the lemon shark. this place is called a shark nursery. and why are these young sharks here? because there are predators out in the deeper water that would eat these little sharks, namely other sharks. so the young sharks stay here in the shallows, where no predators can get to them. it's a safety zone for the sharks a place where they can get bigger and stronger until it's time to head out to deeper water. and we want to catch one of these sharks and give it a tag, and we can follow their growth. m

koki: so where were you during all this... little howler?ate! back on wolf patrol! aviva: what was going on with you, martin? martin: well, i had fallen way, way, way behind the wolves, and when i finally caught up with them, i discovered they had caught up with a moose. (cawing) whoo! hey, guys. what did the wolf say to the ravens? howl's it going? (cawing) you like that, huh? (cawing) what? i am not slow! i don't have wings. must be nice to be a raven; at least you can fly. (cawing) oh, i get it: you warn the wolves if anyone approaches. (cawing) and they take you to lunch. smart. wolves and ravens make a great creature team. oh, you've got to be kidding me. you wolves just ran 10 miles pulled down a 2,000 lb. moose, devoured it, and now you're off and running again? okay, i'm coming. (whining) jimmy z: what were you whining about, chris? chris: whining? who was whining? i wasn't whining. (whining) it's little howler. i think he's hungry. we'll need a special formula to feed him. i'll look it up in the database. (whining) hurry, koki. he's

koki: so here's the update on the spare createrra keys, brothers kratt.rt the guys the kangaroo inspired discs. zippity, zip, zap, pow! whoa! got it! okay, so all we need to do now is touch a roo and activate the creature power suits. i can't wait to get some real roo kick in these legs. and i'm so psyched to ride around in a pouch! (laughing) and find the keys. oh, yeah, yeah and find the keys, right. wish me luck. wish me more luck. i'm up against the roo boss. (gasping) hey, hopster. if you won't give me back the keys at least let's high-five so i can activate my suit! (groaning) not what i had in-- in mind, but it'll work. activate! ♪ whoa! wow! (giggling) hippity hop! hoppity hip! i got to get used to my new bouncing legs! whoa-- okay, roo boss, ready to take one for the team. right on the button if you don't mind. oof! activate! ugh! (zapping) yep, that's right. there's a new red roo in town! hang on, hopster! let's go over to your house and find those keys! okay, so how do you do it? you lean back on the tail, then kick with both feet. so all i nee