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Hyena Project

@hyenaproject.bsky.social
324 followers 64 following 20 posts

Research team studying spotted hyena behaviour, ecology & evolution in Tanzania’s iconic Ngorongoro Crater since 1996. Sharing science, correcting myths & celebrating hyenas’ wild, weird brilliance 🧪🍪 hyena-project.com

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Dieter Lukas @dieterlukas.fediscience.org.ap.brid.gy · 06/10/2026
The 2026 Society for Open, Reliable, and Transparent Ecology and Evolutionary Biology (@sortee) #Conference will take place virtually on 13th October across time zones. Register here: events.humanitix.com/sortee-confere… Program: conf-sortee.shinyapps.io/2026-progr…
conf-sortee.shinyapps.io
SORTEE conference program 2026
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 06/10/2026
Thanks to international collaborative research! We collected Europe-wide reproductive data of ♀️ #EuropeanWildcats (Felis silvestris) & evaluated how environmental variables affect the reproductive parameters. 👉Our newest publication! Congrats Eva @iviei.bsky.social: doi.org/10.1007/s429...
Wildkatze, European wildcat (Felis silvestris)Wildkatze, European wildcat (Felis silvestris)
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bioRxiv Evolutionary Biology @biorxiv-evobio.bsky.social · 02/10/2026
Anisogamy drives diverse patterns of sex-role divergence www.biorxiv.org/content/10.64898/20…
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Rebecca Sear @rebeccasear.bsky.social · 26/09/2026
If you want hot takes about fertility decline, my money's on this one
The famous New Yorker cartoon by Tom Toro showing a man in a threadbare suit telling children sitting around a fire "yes, the planet got destroyed but for a beautiful moment in time we created a lot of value for shareholders" edited to read
"yes fertility has collapsed, but for a beautiful moment in time we created a lot of value for shareholders"
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Erik Postma @erikpostma.bsky.social · 23/09/2026
Delighted to see this mammoth effort led by @sevans.bsky.social, together with @mevisser.bsky.social, Arie van Noordwijk and Henri Bouwmeester out in @plosbiology.org.
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Erin Siracusa @erinsiracusa.bsky.social · 10/09/2026
Animals are known to prefer kin as social partners. But non-kin bonds are surprisingly common too. So, who forms them, how stable are they & what drives them? In our new @animbehsociety.bsky.social paper we tackle these overlooked questions in free-living rhesus macaques: tinyurl.com/mwsbkjve (1/5)
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Hyena Project @hyenaproject.bsky.social · 13/08/2026
Britain’s ‘Spotted hyena age’. #matrilineal #spottedhyena
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Andy Radford @andyradford.bsky.social · 06/08/2026
Dwarf mongooses adjust space use, information provisioning & resource defence dependent on the relative group size of neighbours to help mitigate threats from both well-matched competitors and more dangerous larger rivals #conflict #mammals @bristolbiosci.bsky.social www.nature.com/articles/s41...
nature.com
Dwarf mongooses pre-emptively alter their behaviour relative to the threat posed by different rival groups - Nature Ecology & Evolution
Using 10 years of GPS data and behavioural observations, the authors show that wild dwarf mongooses pre-emptively alter their behaviours, including space use and sentinel calling, in relation to the l...
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Hyena Project @hyenaproject.bsky.social · 12/08/2026
Hoping y'all enjoyed the hyeclipse 😉 🌞🍪 #Eclipse
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Common Tern Project @commonternproject.bsky.social · 10/08/2026
Question: do I know anyone near Nantes who would be willing to pick up a dead gull-billed tern and its logger? L49 has sadly been killed near a road. I’d be very grateful for a picture and the logger and would of course reimburse postage.
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Mongabay @mongabay.com · 21/07/2026
Eight canopy bridges installed in Brazil saw 15,000 wildlife crossings in 15 months—with zero roadkill recorded. Led by biologist Fernanda Abra, Project Reconecta's low-cost design is now the national standard to curb millions of road deaths across Brazilian highways. Suzana Camargo reports.
news.mongabay.com
Zero roadkill as Amazon canopy bridges secure 15,000 crossings
For some of the world's rarest monkeys, the path to survival now runs through a simple network of ropes.
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Marco Festa-Bianchet 🇨🇦 @marcofesta.bsky.social · 18/07/2026
2018 JWildlManage commissioned a model to question that prolonged, intense selective hunting leads to evolutionary shrinkage of mountain sheep horns. Then stonewalled rebuttal, despite positive referee comments, 6-mo COPE probation for unethical behavior. Rebuttal: 🧪 www.nwsgc.net/proceedings/...
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Hyena Project @hyenaproject.bsky.social · 12/07/2026
The original article comes with short clips of the vocalizations identified during play sessions, but we plan to compile and share a comprehensive library of both spotted hyena vocalizations and behaviours on our YouTube channel.
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Hyena Project @hyenaproject.bsky.social · 12/07/2026
Nice piece about our recent study on play behaviour in Spotted #hyenas. phys.org/news/2026-07...
phys.org
The language of play: Hyenas use facial expressions and vocalizations to de-escalate
Scientists observed spotted hyenas (Crocuta crocuta) playing in the wild and found that their precise, sophisticated communication is on par with that of many primate species. Hyenas play and romp wit...
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Dieter Lukas @dieterlukas.fediscience.org.ap.brid.gy · 06/07/2026
I compiled a list of 350 #funding opportunities for #postdoctoral research #fellowships: docs.google.com/spreadsheets/d/1J2M… I realized I should share this again after mentioning it to some folks at the #EFP2026
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Helen Mylne @helephantmylne.bsky.social · 26/06/2026
Primate Profiles #49: Guianan Red Howler The only record of "tool use" by these monkeys (according to the book I'm currently using) is an adult male hitting a sloth with a large stick. A monkey with a big brain, but maybe questionable morals? 🐒 Image: @fernandofariasbirding (iNat.org)
Red howler monkey walking along a branch with tail in the air. These monkeys are reddish-chestnut all over, with grey facial skin. Their tails are long and prehensile. They have a large throat pouch which helps with their very loud howling calls.
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Joel Pick @joelpick.bsky.social · 22/06/2026
What is the replication crisis? Is it a problem in Ecology and Evolution? Can journals help us fight it? I'll be answering all these questions and more later this week in a free and open @sortee.bsky.social webinar. Come along to find out more!!
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 17/06/2026
Check out our latest IZW press release together with the Institute of Virology, #Charité – Universitätsmedizin Berlin, about West Nile virus (WNV) within Berlin urban area. The virus circulates between native 🦟mosquitoes & 🪶birds 👉https://www.izw-berlin.de/en/press_releases.html #urbanbiodiversity
A house sparrow (Passer domesticus) in Berlin - a typical host of the West Nile virus (photo by Jon A. Juarez)
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Danai Papageorgiou @danaipapageorgiou.bsky.social · 04/06/2026
In our new TREE paper, with M. Borgerhoff Mulder, S. Brosnan and E. Strauss we show that power in animal societies can be subject to control. When high-powered individuals use aggression to gain better access to resources, other group members can respond with "levelling". doi.org/10.1016/j.tr...
doi.org
Redirecting
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Stephanie L King @stephanielking.bsky.social · 02/06/2026
New paper in @pnas.org - using playback experiments we provide further evidence that bottlenose dolphins can use individual identity signals + social memory to guide decision-making. Female dolphins use individual vocal labels to track coercive males | PNAS www.pnas.org/doi/10.1073/...
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 27/05/2026
🦊🦝🐿️Das IZW @leibniz-gemeinschaft.de ist mit dabei: Langer Tag der #Stadtnatur. Meldet Euch an! Erhaltet u.a. Einblicke in unsere Hyänen-Forschung @hyenaproject.bsky.social, lernt das Netzwerk "Wildtiernah Berlin" kennen...Nice pics, talks & more: 30.5. 👉 www.langertagderstadtnatur.de/angebote/det...
langertagderstadtnatur.de
Erforscht wilde Tiere!,
Kennt ihr schon das WildtierMobil? Heute bieten wir euch exklusiv die Möglichkeit, bei uns am IZW einen Blick in unsere mobile Tierarztpraxis zu werfen! In unserem Hof warten außerdem spanne
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 21/05/2026
📢New study alert on #largecarnivore #conservation! 💻We modelled the impact of translocations on #Eurasianlynx (Lynx lynx) 🐾 across western +central Europe to find: 👉Most populations will remain stable in the near future but #populationconnectivity between Eastern & Western Alps is very poor...
Bild von der Broschüre LIFE Lynx: https://www.lifelynx.eu/
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Hyena Project @hyenaproject.bsky.social · 13/05/2026
Giving birth through an elongated clitoris, spotted hyena females know all about it. 😬 Spotted hyena newborns are fur balls of 3.5 kg that are born with their eyes open and teeth erupted.
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 12/05/2026
❗Have you ever heard of the tamaraw or Oliver’s warty pig? So amazing! These rare species live in Mindoro, Philippines which is a #biodiversity hotspot with many endemic and threatened species. 🌴🐾📷 #CameraTrapping #EndangeredSpecies #WildlifeMonitoring
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 08/05/2026
Our colleagues organizing a free workshop / training in #Vietnam on *Basic and Advanced Statistical Modelling*📈. Open now for registration! 👉Check out the two course modules (Aug & Dec 2026) & the objectives here: www.leibniz-izw-akademie.com/seminare/int...
leibniz-izw-akademie.com
Introduction to Basic and Advanced Statistical Modelling — Leibniz-IZW-Akademie
Introduction to Basic and Advanced Statistical Modelling Free workshop at the Institute of Advanced Technology, Ho Chi Minh City, Vietnam Target audience: Master’s students, PhD students, Earl...
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Tay (Antonio J. Osuna Mascaró) @biotay.bsky.social · 02/05/2026
1/2 Adult play Although phylogeny predicts which primates play as adults (if play exists in one species, it is more likely to exist in close ones), it is whether or not the society is tolerant (and not despotic) that best predicts this behavior (paper) royalsocietypublishing.org/rsbl/article...
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Dieter Lukas @dieterlukas.fediscience.org.ap.brid.gy · 04/05/2026
"Can we take the grackle successes and apply them to threatened species, see if it helps them survive in human-modified environments?" Cool writeup and video short on #TheGrackleProject and #ManyIndividuals
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 27/04/2026
News from our #urban #squirrel project #Sciurus vulgaris #Berlin using #cameraTrapping and #CitizenScience:
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Joel Pick @joelpick.bsky.social · 24/04/2026
This is a short article type, perfect for getting students started with the research process and with publishing. See more about this from Kate here: bsky.app/profile/kate... dynamicecology.wordpress.com/2026/02/17/t... We hope this is the first step in many journals seeking out replications
dynamicecology.wordpress.com
The value of close replications and how to get more of them: interview with Kate Laskowski
Welcome to our latest interview with the author of a recent interesting paper. Today’s interview was conducted by email with behavioral ecologist Kate Laskowski, first author of Laskowski et …
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Arnaud Tognetti @atognetti.bsky.social · 13/04/2026
🚨✨ JOB OFFERS ✨🚨 🧠 Interested in disgust and human disease avoidance? 🦠🤢 🎓 2 PhD positions (Montpellier 🇫🇷) + 1 postdoc (Stockholm 🇸🇪) now open! 📢 Exciting projects in VR, psychophysiology, psychoneuroimmunology, social behavior, and health 🧵 Details + deadlines in thread below!
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Hyena Project @hyenaproject.bsky.social · 01/04/2026
Led by the amazing Martina Francesconi, Erica Masciarelli, Virginia Schianini and Elisabetta Palagi from the University of Pisa and in collaboration with Michael Job from Siyafunda Wildlife & Conservation. 5/5
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Hyena Project @hyenaproject.bsky.social · 01/04/2026
Bonus #hyenafact: we identified 13 vocal types during play, including 5 new types: whimper, bark, harshbark, muted-squeal, and soft-grunt. 4/5
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Hyena Project @hyenaproject.bsky.social · 01/04/2026
In more complex group settings, where individuals cannot always rely on visual signals, #vocalizations become more prominent. 👉 They use sounds to effectively compensate for reduced access to facial expressions 🤓 The clever beasts adjust their signalling strategy to the social context! 3/5
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Hyena Project @hyenaproject.bsky.social · 01/04/2026
We analysed 238 play sessions of hyenas in the #NgorongoroCrater, Tanzania, and Greater Makalali Private Game Reserve, South Africa. 👉 In simple, one-on-one settings, #hyenas frequently use the “relaxed open mouth”, a facial expression that is widespread in mammals to signal harmless play. 2/5
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Hyena Project @hyenaproject.bsky.social · 01/04/2026
New #hyena study ! 📢🧪 Spotted hyenas LOOOOOVE TO PLAY, even as adults! But how do these powerful carnivores make sure that everybody involved knows that they “just want to play”? 👉 They use a combo of visual and vocal signals, depending on the context! 🤓 doi.org/10.1007/s002... 1/5
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 30/03/2026
Congratulations to An Nguyen on successfully defending his PhD!!! His work stands out by combining one of the largest #Camtrap datasets with advanced modelling to reveal how snaring drives #Defaunation in Vietnam - providing actionable insights for targeted #Conservation and #SpeciesProtection.
An wearing his fantastic doctoral hat
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Maria Moiron @mmoiron.bsky.social · 25/03/2026
If you enjoyed the paper below👇👇, you might also be interested in our symposium on “Eco-Evolutionary Dynamics in a Changing World” at the Nordic Oikos-GfÖ conference! The amazing Viktoriia Radchuk will be giving a talk, and we still have a few spots open, reach out to if interested! #NSO2026 🐦🌴🐝🌡️📉
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Hyena Project @hyenaproject.bsky.social · 24/03/2026
👉 One trait — how quickly females reproduce again — was better predicted by proportional rank. So reproduction isn’t just about resource access, but also social constraints (e.g. ability to nurse cubs at communal den). Take-home: “rank” isn’t one thing—metrics shape the story. 5/5
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Hyena Project @hyenaproject.bsky.social · 24/03/2026
Main results: 👉 Ordinal rank best predicted most reproductive traits. Why? Top individuals often get priority access to food & mates—key drivers of fitness. But not everything followed this pattern… 4/5
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Hyena Project @hyenaproject.bsky.social · 24/03/2026
We compared two ways to measure rank: • Ordinal rank: your absolute position (#1, #2, #3…) • Proportional rank: your position relative to how many are above/below you These metrics aren’t interchangeable — they reflect different biological processes. 3/5
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Hyena Project @hyenaproject.bsky.social · 24/03/2026
Higher rank often means higher reproductive success—but why? Is it about excluding rivals from food & mates? …or coping better with social constraints? We tested this using 28 years of data on 6 reproductive traits in 481 male + female hyenas of our 8 study clans in the Ngorongoro Crater. 2/5
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Hyena Project @hyenaproject.bsky.social · 24/03/2026
New #hyena study out @ecol-evol.bsky.social ! 📢🧪 What does it mean to be “high-ranking”? And does it always predict reproductive success? 🤔 Turns out: how you *measure* rank can change the answer. 👉 onlinelibrary.wiley.com/doi/10.1002/... 1/5
onlinelibrary.wiley.com
The Effect of Social Rank on Reproductive Traits Depends on Rank Metric: Evidence From a Group‐Living Carnivore
In animal societies, one's social rank determines access to resources like food, mates, and allies. Using longitudinal data on 481 spotted hyenas, we tested two common social rank metrics with differ...
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Fichtel-Kappeler-Lab @kirindy.bsky.social · 24/03/2026
Seeking a motivated postdoc (2+3 yrs) to study links between cognition, behavior, and fitness in lemurs at our long-term field site in Kirindy Forest, Madagascar. Join an interdisciplinary team working on wild populations. @primatenzentrum.bsky.social. Apply here: www.dpz.eu
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 02/03/2026
Our package estar for quantifying ecological stability is out: MEE @britishecologicalsociety.org! Provides 11 stability metrics for measuring stability at different levels of organization, from individuals to populations, communities + ecosystems. besjournals.onlinelibrary.wiley.com/doi/10.1111/...
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 24/02/2026
📢 You look for a student #Job? You'd like to contribute to current research topics about birds🪶🐦 & #WestNileVirus? Then be part of a consortium on "Combating #WNV through an integrated #OneHealth approach" #TUBerlin , #Charite, #FUBerlin, #UniBayreuth ... Apply here at #IZW: short.sg/j/63072339
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Dieter Lukas @dieterlukas.fediscience.org.ap.brid.gy · 04/02/2026
Suggestions for how to develop systematic approaches to create equitable futures for individuals with disabilities in higher education www.mdpi.com/2076-0760/15/2/94 🧵 by author:
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Dieter Lukas @dieterlukas.fediscience.org.ap.brid.gy · 23/01/2026
"What animals can teach us about overcoming tyranny" www.bbc.com/future/article/20260121…
bbc.com
What animals can teach us about overcoming tyranny
Some animal societies are ruled by despots with an iron fist, while others seem naturally egalitarian – and they all have lessons for us.
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Ecological Dynamics Dept. | IZW Berlin @ecodynizw.bsky.social · 18/01/2026
Led by Viktoriia Radchuk, an international collaboration shows phenological shifts in response to changing temperatures allow populations to remain stable or even increase in numbers. Support from #sDiv @idiv-research.bsky.social
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Hyena Project @hyenaproject.bsky.social · 17/11/2025
Our findings reveal how social structure and non-random dispersal generate hidden genetic structure and result in heterogenous rates of adaptive evolution. Led by the *brilliant* Kasha Strickland! #longterm
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Hyena Project @hyenaproject.bsky.social · 17/11/2025
This demonstrates adaptive benefits of gene flow and no evidence for selection against males from outside the Crater. Finally, additive genetic variance in fitness differed among clans. This is cool because it shows that evolutionary potential is unevenly distributed across the population. 3/4
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