Jeroen Zewald
@zewaldj.bsky.social
250 followers 120 following 7 posts
PhD studying playful Goffin's cockatoos 🦜
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Reposted by Jeroen Zewald
science.org
Elephants gesture to signal what they want—just like us.

Learn more: scim.ag/3IyDRrq
Reposted by Jeroen Zewald
Reposted by Jeroen Zewald
gwenwiro.bsky.social
We're hiring📢📢📢
To complement our team we're currently looking for a postdoctoral researcher with expertise in animal communication and behaviour, ideally canids but not a must! Position is based in Vienna, Austria, and available for 4 years. Please check the attachment for details 🐺🐶😊
Reposted by Jeroen Zewald
biotay.bsky.social
Lovebirds have begun to use air conditioning in buildings in Phoenix, only during the hottest months and when the temperature approaches the maximum they can tolerate.

(paper, 2021) royalsocietypublishing.org/doi/full/10....
vía @zewaldj.bsky.social
(blog) www.forbes.com/sites/grrlsc...
Reposted by Jeroen Zewald
evoldir.bsky.social
PhD positions in bird cognition and behavior at the University of Hong Kong are open for motivated candidates. Applicants should have a biology background. Apply to Dr. Simon Sin at [email protected]. More info: www.simonywsin.com. #phd
Reposted by Jeroen Zewald
stephanielking.bsky.social
We are looking for a Research Assistant to contribute to our ongoing analysis of dolphin acoustic data from West Wales - collaboration between @wtsww.bsky.social @bristolbiosci.bsky.social 🐬
Deadline is 29th June - please share widely!
www.bristol.ac.uk/jobs/find/de...
Details | Working at Bristol | University of Bristol
www.bristol.ac.uk
Reposted by Jeroen Zewald
science.org
Cockatoos have learned to operate drinking fountains in Australia.

The behavior—never before seen in birds—may be a developing cultural tradition among one population: scim.ag/4kIi12G
Reposted by Jeroen Zewald
thomasmacgillavry.bsky.social
Did you know that riflebirds are the only known bird with “double jointed” wrists?

It’s a nice example of how sexual selection can mess with the bodies of males (and females) to accommodate unusual displays

Read more about these spectacular displays here:

doi.org/10.1093/biol...
The mechanics of male courtship display behaviour in the Ptiloris riflebirds (Aves: Paradisaeidae)
Abstract. Sexual selection through female choice has driven the evolution of some of the most elaborate signalling behaviours in animals. These displays of
doi.org
Reposted by Jeroen Zewald
thomasmacgillavry.bsky.social
Our paper on brain size evolution in birds of paradise was recently accepted!

In brief:
•BoPs have big brains, comparable to those of medium-sized corvids
•Neither absolute nor relative brain size appears to have co-evolved with display complexity

doi.org/10.1093/orni...
Did complex song and dance co-evolve with brain size in the birds-of-paradise (Aves: Paradisaeidae)?
Abstract. Complex signaling behaviors, such as avian song and courtship displays, have been associated with increases in both absolute and relative brain s
doi.org
Reposted by Jeroen Zewald
rebeccakoomen.bsky.social
🎊Fully funded PhD position on cooperative sustainability🌳

Are you curious about
🧒 developmental,
🌍 cross-cultural
🦧 species comparative
research on cooperative sustainability?

All info here or dm me with questions!
career2.successfactors.eu/sfcareer/job...
Please share! 🙏
Career Opportunities: PhD position Cooperative Sustainability (14208)
career2.successfactors.eu
Reposted by Jeroen Zewald
wildbehaviorpod.bsky.social
NEW EPISODE 📣
To study animals in the wild you have to find the animals & build a research "villa" before you even start the science

@mohara.bsky.social & @bmioduszewska.bsky.social took on this challenge to study wild Goffin's cockatoos on a small Indonesian island
Photos: Goffin lab Tanimbar
Mark O'Hara sits in a tree with camera equipment. Everything is fully dressed in camouflage. Mark looks happy to be there. Berenika watches wild cockatoos (not in shot) with camera equipment. Everything is fully dressed in camouflage.
Reposted by Jeroen Zewald
ivojacobs.bsky.social
Black kites gather at Australian bushfires to hunt flying insects fleeing the blaze
#birds
Reposted by Jeroen Zewald
biotay.bsky.social
1/2 Sidney's cockatoos have learned to use drinking fountains

It's a tricky mechanism that requires turning and holding a handle.
They've figured out how to do it using their own weight,
and now it's cultural : )

(paper) royalsocietypublishing.org/doi/full/10....
by @lucymaplin.bsky.social
Reposted by Jeroen Zewald
wildbehaviorpod.bsky.social
Why did some birds evolve to be so clever? Mark O'Hara & Berenika Mioduszewska took on the challenge of studying wild Goffin's cockatoos on a small Indonesian island.
Their exciting findings help answer that question.

Listen: linktr.ee/wild_behavior_pod
Photo: Goffin Lab Tanimbar
Five white Goffin's cockatoos sit on various branches of a small tree with large green leaves. They have cute, big eyes and quite small beaks. They are about the same size as the leaves.
Reposted by Jeroen Zewald
lucymaplin.bsky.social
Two paper just out from the #clevercockieproject!

@julia-penndorf.bsky.social reveals how cockies play politics when deciding who to aggress: royalsocietypublishing.org/doi/full/10....
&
@barbaraklump.bsky.social describes a new 'drinking innovation':
royalsocietypublishing.org/doi/10.1098/...
Reposted by Jeroen Zewald
biotay.bsky.social
1/2 Non-human gamers

Review of studies that have used games in the study of the animal mind. It has been documented how they become emotionally involved (when winning and losing) and play for the sheer pleasure of playing (dolphins, apes, and parrots)

(paper) www.sciencedirect.com/science/arti...
Reposted by Jeroen Zewald
biotay.bsky.social
1/2 The game of Balinese macaques

In Bali, macaques play a game where they cover their eyes with objects to challenge themselves to overcome difficult tasks (pirouettes or walking stairs), and attract the attention of others to play

(paper) link.springer.com/article/10.1...
v @zewaldj.bsky.social
Reposted by Jeroen Zewald
raccoonologist.bsky.social
Another Easter at the aviary 🐣 🐣 🐣 … both the downside and upside to being on the property for all the holidays!
A collage of white goffins cockatoos playing with colourful Easter eggs and dandelions View from above of Jen looking up and white goffins cockatoos playing with colourful Easter eggs
Reposted by Jeroen Zewald
divintelligence.bsky.social
📣📣📣

Applications for the 2025 Diverse Intelligences Summer Institute (DISI) are now open!!

Are you interested in intelligence, mind, and cognition in all its forms? Early-career scholars from any discipline—and storytellers in any medium—are encouraged to apply!

More info: disi.org
Reposted by Jeroen Zewald
raccoonologist.bsky.social
Look what I discovered at the lab - it’s @auersperga.bsky.social’s new book, hot off the press! If you can read German, get your copy 😍
Book titled “Der Erfinder Geist der Tiere : Werkzeuge, Ideen und Innovationen.” by Alice Auersperg. Stylized old drawings of otters. Capuchins and a cockatoo holding a fork
Reposted by Jeroen Zewald
zewaldj.bsky.social
Do you want to join our Goffin group and work with amazing cockatoos and great people? 🦜 Apply for this new PhD position in our team on tool use!!