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March Mammal Madness

The official location for March Mammal Madness tournament information and resources! If you're learning, you're winning!

2023MMM Tournament Schedule

school lunch style calendar of events for the 2023 MMM tournamentThe action starts at 8 PM Eastern / 5 PM Pacific on all game nights.

2023 March Mammal Madness CALENDAR 

Game Time is 8 PM Eastern/5 PM Pacific for all tournament nights.

Date Event
February 21 (TUES) BRACKET DROP DAY!!!
March 12 (SUN) Wild Card Eve
March 13 (MON) WILD CARD
March 15 (WED) Round 1: Dad Bods Division
March 16 (THURS) Round 1: Mighty Stripes Division
March 20 (MON) Round 1: Animal Engineers Division
March 22 (WED) Round 1: Itty Bitty Comeback City Division
March 23 (THURS) Round 2 Dad Bods & Mighty Stripes
March 27 (MON) Round 2 Animal Engineers & Itty Bitty Comeback City
March 29 (WED) SWEET 16

2023 Tournament Randomized Locations: Tropical Rainforest, Sub-tropical Desert, Ephemeral Wetlands, Ghost Forest

Welcome to March Mammal Madness!

the words "2023 march mammal madness" with animal silhouettes as part of the lettersWelcome to March Mammal Madness! This library guide is your official location for MMM tournament info and resources to help you fill out your bracket.

Inspired by (but in no way affiliated with or representing) the NCAA College Basketball March Madness Championship Tournament, March Mammal Madness is an annual tournament of *simulated* combat competition among animals. Scientific literature is cited to substantiate likely outcomes as a probabilistic function of the two species' attributes within the battle environment. Attributes considered in calculating battle outcome include temperament, weaponry, armor, body mass, running speed, fight style, physiology, and motivation.

  1. Get your bracket! Are you a Player or a Learner? (Educators, we have you covered too!)
  2. Pick your winners by March 12, 2023 for the Wild Card!
  3. Follow the action
    1. Live on Twitter: Follow #2023MMM or @MMMletsgo - a curated twitter account that only includes bout tweets, not spectator trash talk. Teachers may also want to use #2023MMMk12 with their students for a more student-friendly twitter feed.
    2. Read archived bouts, summaries, and videos here daily after each match if you can't participate live.
    3. March Mammal Madness Facebook Page

Getting Started Resources

Battle Outcome

How are the winners determined?

The organizers take information about each combatant's weaponry, armor, fight style, temperament/motivation, and any special skills/consideration and estimate a probability of the outcome and then use a random number generator to determine the outcome. This is why there are upsets in the tournament.

Another thing that can happen is if a species has to battle in an ecology that is really bad for it - for example, if a cold adapted species is battling in a tropical forest, it can dangerously overheat- changing the outcome probabilities. Sometimes an animal gets injured or snaps a canine in a previous round that carries over into the next round- just like an injury of a star player totally changes a basketball team's outcome. Also hiding or running away counts as a forfeit.

In the early rounds the battle location is in the preferred habitat of the better-ranked combatant in the battle, and ecology can play a huge role in what happens. Once to the Elite Trait, the battle location is random among 4 ecologies for the remaining battles. The location is announced right before the battle.

Participants fill out their brackets with their choices for the winners for each bout. Scoring occurs at the end of the tournament, points allocated as follows:

  • Wild Card = 1 point
  • Round 1 = 1 point each
  • Round 2 = 2 points each
  • Round 3 = 3 points each
  • Round 4 = 5 points each
  • Round 5 = 8 points each
  • Champion= 13 points

Captain America looks patient with the text "So you didn't watch the 2023 MMM key details video and are wondering about the random habitats"

Starting with the Elite Trait, tournament locations take place in one of these four random habitats:


How do I play?

We can only suggest the following for maximal fun and learning. Print out the bracket, predict who will win in each of the match-ups in round one, then round two, and so on and so forth, all the way out to your prediction who wins the championship! Get your friends, colleagues, and/or family to play. Post brackets on wall prominently. Trash talk their selections that depart from yours. Follow along in real time to battle play by plays on Twitter by following hashtag #2023MMM or @MMMletsgo on scheduled bout nights. If twitter isn't your thing, check the facebook page, the blog, or this library guide for updates a couple hours AFTER the bouts conclude for the night (or the next morning)

What do the numbers next to the combatants mean?

These correspond to the relative rankings among the species. 1 is the highest/best ranked team in the division and 16 is the lowest/worst - the number assigned is referred to as "seeding" but it's functionally interchangeable with ranking (seeded/ranked are therefore also interchangeable).

The single elimination bracket battle favors the strongest teams until you get out to the semi-finals: seed 1 plays (crushes) seed 16, seed 2 plays seed 15, etc. As soon as a species loses, it's out of the tournament (unless it Alt-Advances)!

Are the battles one on one, or do social animals get their buddies?

Typically, battles are one on one. However, in 2017 there was a team: the Neanderthal Hunting Party, which was a small group of hunters working together with Neanderthal technology. In general, assume that the combatants represent the most prime-aged, healthy and strong specimen of that species. Also, just as in nature, there can occasionally be scientifically-grounded outside interference.

Is the battle always to the death?

The battles are NOT always “nature, red in tooth and claw.” Sometimes the winner "wins" by displacing the other at a feeding location, sometimes a powerful animal doesn't attack because it is not motivated to- a few years ago in the “Who in the What Now?” Division we had a dhole lose to a binturong because the night before dhole had gorged on babirusa and the gut passage time of wild canids is 24-48 hours. This meant that the dhole was still full from the night before and unwilling to take the risks of tangling with the binturong. Even a small claw cut or bite wound can get infected and lots of times an animal will back down rather than take a risk for little potential benefit.

What is an "upset"?

This is when a low ranked team beats a high ranked team. 9 beating 8 isn't a super impressive upset. In the actual NCAA tournament, upsets happen when a 12 will beat a 5 or an 11 will beat a 6, once every few years a 15 will beat a 2 in the first round. For example,

“Coming off its 11th national championship the season before, UCLA was ready to make another run through the 1996 NCAA tournament as a No. 4 seed. But in his final year as coach, Pete Carril and his 13 seeded Princeton offense got the best of the Bruins, stunning Jim Harrick’s squad in the first round with a last-second basket on a backdoor cut.”

What is a “Cinderella” team?

A "cinderella" team is a low-ranked team that progresses multiple rounds of the tournament systematically beating higher ranked teams.

So should I always pick the better ranked mammal?

No! Real fans don’t abandon their favorite animals just because they are pathetic at this kind of battle (although hopefully well-suited to their particular ecological niche). People will clown you if your bracket is TOO conservative by always picking the better-ranked team.

Also the rankings are not infallible and there are upsets in nature too. Upsets are what make March Mammal Madness exciting. Like in 2015 when #3 seed Quokka exited stage left for those sweet burger rings, allowing #14 seed Numbat to advance!!! OMG! WHO SAW THAT COMING!?!?!?!

Wait, I thought this was a battle of mammals! What are all those #AltMammals doing here?

Did you know that longtime MMM co-organizers Chris Anderson and Josh Drew aren't even mammalogists? Chris is an entomologist and Josh is a marine biologist who primarily studies fish! AND well, apparently people see "cats" everywhere they look. Most importantly, all animals are awesome, so March Mammal Madness puts an asterisk behind 'Mammal.'

I love otters! Can I call them my "spirit animal" without perpetuating racism and settler colonialism?

Most probably not. If you have a deep affinity for an animal, but your identity means you are culturally appropriating when you use the term, there are many options. We suggest: "inner animal", "anima", "emblem", or "animal quiddity/quidditas." #WordNerds

March Mammal Madness Scholarship and Data

The ASU Library acknowledges the twenty-three Native Nations that have inhabited this land for centuries. Arizona State University's four campuses are located in the Salt River Valley on ancestral territories of Indigenous peoples, including the Akimel O’odham (Pima) and Pee Posh (Maricopa) Indian Communities, whose care and keeping of these lands allows us to be here today. ASU Library acknowledges the sovereignty of these nations and seeks to foster an environment of success and possibility for Native American students and patrons. We are advocates for the incorporation of Indigenous knowledge systems and research methodologies within contemporary library practice. ASU Library welcomes members of the Akimel O’odham and Pee Posh, and all Native nations to the Library.