Jessica Light Profile picture
Mar 15, 2018 17 tweets 8 min read Read on X
NEXT UP: 6th seed Jaguarundi (Puma yagouaroundi) vs 11th seed Desman (Galemys pyrenaicus) #2018MMM
Wait, a who and a what? You know...jaguarundi...a New World cat that looks sort of like like a big weasel #2018MMM
Jaguarundi great adaptations include: long & slender body w/short legs, variable coat color, diurnal activity, habitat generalist, &, as a member of the Carnivora, #carnassials #2018MMM
The geographic distribution of the jaguarundi is believed to get as far north as the southern United States (Arizona & Texas). However, populations in North & Central America are at risk, with jaguarundis believed to be extinct in the United States #2018MMM
Desmans are aquatic insectivores. Great adaptations are associated with its aquatic nature: elongated head, body, & tail, strong & webbed hindfeet for swimming, waterproof fur, the ability to close both ears & nostrils with valves to keep water out, & snorkel-like nose #2018MMM
Cool fun fact: desmans may use echolocation for orientation & prey detection bit.ly/2HxmFhu #2018MMM
Like jaguarundis, desmans also are at risk with populations declining across its European range due to habitat loss iucnredlist.org/details/8826/0 #2018MMM
Although jaguarundis & desmans belong to separate orders (Carnivora & Soricomorpha/Eulipotyphla, respectively), both are in the superorder Laurasiatheria & last shared a common ancestor in the Cretaceous ~89 mya timetree.org #notsodifferent #2018MMM
Our battle tonight takes place this evening in the Atlantic Rainforest of Brazil, where jaguarundis are known to prey upon a variety of vertebrate taxa, including small mammals scielo.br/scielo.php?pid… #2018MMM
Even though it is in completely the wrong hemisphere, the desman is not too far outside of its comfort zone (although it is a little warm). Our desman easily finds some fastish-moving water & begins to hunt for aquatic insects & crustaceans #2018MMM
Meanwhile, our jaguarundi has woken up & is looking for a midnight snack #2018MMM
Weighing in at 4.5-9 kg (a minimum of ~20 stoats), the jaguarundi far outweighs the desman (35-80 g). And the desman falls nicely within the size range of jaguarundi prey #stoatsasmeasurement #2018MMM
Hearing splashing, our jaguarundi quietly goes to investigate & spies the desman in the water. With its tiny eyes & poor eyesight, the desman is unaware of any potential danger (easy prey, perhaps??) #2018MMM
But, desmans are known to be territorial, defending their territories to the death against intruders #2018MMM
Rather, desmans *WERE* known to be territorial. Recent research does not support territorial behavior in desmans link.springer.com/article/10.100… & link.springer.com/article/10.100… #2018MMM
The jaguarundi pounces. Splashing ensues. Tails flip in & out of the water. A red tint pools to the water's surface #2018MMM
JAGUARUNDI DEFEATS DESMAN!!! #2018MMM

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More from @je_light

Apr 3, 2018
UP FIRST TONIGHT: everyone's favorite river horse, the 1-seeded PYGMY HIPPO Hexaprotodon (formally Choeropsis) liberiensis, vs. the scrappy 4-seeded brush wolf, COYOTE Canis latrans! #2018MMM
Many minds came together to bring you tonight's first battle, so a quick hat-tip to @AnneWHilborn, @PKurnath, @TCastanea, & @tinkeringprim8. Seriously, the #teamwork has been amazing #Monstars #2018MMM
To reach the #FinalRoar, Hippo crushed star-nosed mole, intimidated both maned rat & Tasmanian devil, & STOMPED the cheetah out of competition #hangryhippo #2018MMM
Read 36 tweets
Mar 29, 2018
UP NEXT: #3 seed Berlin Boar (Sus scrofa) vs #7 seed Porcupine (Erethizon dorsatum) #2018MMM
The top-ranked competitor still has homefield advantage, so this Urban Jungle battle takes place in Berlin, Germany. Berlin Board & Porcupine don't have a lot in common; they last shared a common ancestor ~96 mya (timetree.org) #2018MMM
Did you know what "Porcupine" is Latin for "Quill Pig"? Follow #ActualLivingScientist @porcupinedoc for some more amazing porcupine facts #2018MMM
Read 18 tweets
Mar 27, 2018
First up in Kat's Away division, Orinoco Crocodile (#1 seed) vs Goliath Tarantula (#9 seed) #2018MMM
This battle was written by the fabulous @c_n_anderson, & it's a doozy. Buckle up folks #2018MMM
The critically endangered Orinoco crocodile defeated the praying mantis in R1 and faces another arthropod tonight. arkive.org/orinoco-crocod… #2018MMM
Read 17 tweets
Mar 23, 2018
NEXT UP: #3 Crabeater Seal Vs. #6 Jaguarundi!!! #2018MMM
This battle was written by @Drew_Lab. Josh is in the UK right now & he was at Darwin's House today. How cool was that? #2018MMM
The Crabeater Seal skated into R2 after lightly munching on the surprisingly aptly named Edible Dormouse, while the Jaguarundi defeated the Desman #2018MMM
Read 21 tweets
Mar 22, 2018
NEXT UP: 8th seeded Bothrops asper (Terciopelo or Lancehead) vs. 9th seeded Theraphosa blondi (Goliath Tarantula or Goliath Bird-Eating Tarantula) #2018MMM
AKA, THE GREAT VENOM BATTLE OF 2018!! We've seen a lot of venom tonight. Who's ready for more?? #2018MMM
First, a brief review of venomous vs poisonous. Both competitors in this match-up are venomous #2018MMM
Read 21 tweets
Mar 20, 2018
NEXT UP: 7th seeded Porcupine (Erethizon dorsatum) vs 10th seeded Delhi Rhesus (aka, Rhesus Monkey or Rhesus Macaque; Macaca mulatta) #2018MMM
Erethizon dorsatum are the 2nd largest rodents in North America (1st place goes to beavers), weighing anywhere between 5-14 kg (23-64 stoats #stoatsasmeasurement) #2018MMM
When we think porcupines, we think quills, right? Quills & spines have evolved multiple, independent times across the mammal tree of life as a defense strategy & are excellent examples of convergent #evolution (see the hedgehog battle) (animaldiversity.org/collections/sp…) #2018MMM
Read 22 tweets

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