Jeroen Zewald
@zewaldj.bsky.social
PhD studying playful Goffin's cockatoos 🦜
Reposted by Jeroen Zewald
New True Facts : www.youtube.com/watch?v=Oq9J...
True Facts: Is The Goffin's Cockatoo The Smartest Bird?
YouTube video by Ze Frank
www.youtube.com
January 18, 2026 at 3:33 PM
New True Facts : www.youtube.com/watch?v=Oq9J...
Reposted by Jeroen Zewald
Ze Frank is the best, and "the Goffin's cockatoos make the New Caledonian crows look like Old Caledonian crows" (this it's an actual comment on YouTube!)
Don't miss this video about our work at the Goffin Lab (and the Tanimbar Lab!)
"I've seen a cockatoo. I've seen a cockatoo 🤘"
Don't miss this video about our work at the Goffin Lab (and the Tanimbar Lab!)
"I've seen a cockatoo. I've seen a cockatoo 🤘"
January 18, 2026 at 7:19 PM
Ze Frank is the best, and "the Goffin's cockatoos make the New Caledonian crows look like Old Caledonian crows" (this it's an actual comment on YouTube!)
Don't miss this video about our work at the Goffin Lab (and the Tanimbar Lab!)
"I've seen a cockatoo. I've seen a cockatoo 🤘"
Don't miss this video about our work at the Goffin Lab (and the Tanimbar Lab!)
"I've seen a cockatoo. I've seen a cockatoo 🤘"
Reposted by Jeroen Zewald
Is dogs’ tendency to follow human misleading communicative cues influenced by humans’ auditory perspective?
link.springer.com/article/10.1...
link.springer.com/article/10.1...
Is dogs’ tendency to follow human misleading communicative cues influenced by humans’ auditory perspective? - Animal Cognition
Studying Theory of Mind in non-verbal populations requires designing tasks that address the distinction between responding based on directly perceivable cues and additionally inferring others’ mental ...
link.springer.com
January 19, 2026 at 1:34 PM
Is dogs’ tendency to follow human misleading communicative cues influenced by humans’ auditory perspective?
link.springer.com/article/10.1...
link.springer.com/article/10.1...
Cow cognition might have been underestimated, but check out this exciting study by @biotay.bsky.social and @auersperga.bsky.social. Perhaps they do deserve more credit in the field of animal cognition than they have been given 🧹🐮
Cow Tools!
We have lived alongside cows for nearly 10,000 years.
We breed them and exploit them
It is now, only now, that we have discovered THEY CAN USE TOOLS
Here I describe our study
(paper) www.sciencedirect.com/science/arti... in @currentbiology.bsky.social
with @auersperga.bsky.social
We have lived alongside cows for nearly 10,000 years.
We breed them and exploit them
It is now, only now, that we have discovered THEY CAN USE TOOLS
Here I describe our study
(paper) www.sciencedirect.com/science/arti... in @currentbiology.bsky.social
with @auersperga.bsky.social
January 20, 2026 at 1:07 AM
Cow cognition might have been underestimated, but check out this exciting study by @biotay.bsky.social and @auersperga.bsky.social. Perhaps they do deserve more credit in the field of animal cognition than they have been given 🧹🐮
Reposted by Jeroen Zewald
January 16, 2026 at 8:59 PM
Reposted by Jeroen Zewald
✨New paper✨
How do juvenile ravens find social groups?
We describe how juvenile common ravens, who have left their natal territories seeking to join non-breeder flocks, use space with respect to other birds, and discuss what this means for social integration.
www.cell.com/iscience/ful...
How do juvenile ravens find social groups?
We describe how juvenile common ravens, who have left their natal territories seeking to join non-breeder flocks, use space with respect to other birds, and discuss what this means for social integration.
www.cell.com/iscience/ful...
January 11, 2026 at 2:34 PM
✨New paper✨
How do juvenile ravens find social groups?
We describe how juvenile common ravens, who have left their natal territories seeking to join non-breeder flocks, use space with respect to other birds, and discuss what this means for social integration.
www.cell.com/iscience/ful...
How do juvenile ravens find social groups?
We describe how juvenile common ravens, who have left their natal territories seeking to join non-breeder flocks, use space with respect to other birds, and discuss what this means for social integration.
www.cell.com/iscience/ful...
Reposted by Jeroen Zewald
Our new theoretical paper on combinatory tool use origins is out !
with @raccoonologist.bsky.social
onlinelibrary.wiley.com/doi/epdf/10....
with @raccoonologist.bsky.social
onlinelibrary.wiley.com/doi/epdf/10....
The flexible, the stereotyped and the in‐between: putting together the combinatory tool use origins hypothesis
You have to enable JavaScript in your browser's settings in order to use the eReader.
onlinelibrary.wiley.com
January 1, 2026 at 1:00 PM
Our new theoretical paper on combinatory tool use origins is out !
with @raccoonologist.bsky.social
onlinelibrary.wiley.com/doi/epdf/10....
with @raccoonologist.bsky.social
onlinelibrary.wiley.com/doi/epdf/10....
Reposted by Jeroen Zewald
I had the honour of working to bring @auersperga.bsky.social’s baby to life. It’s a VERY heavy baby - over 200 references (and yes I read them all) - but necessary to do justice to our new hypothesis of combinatory tool use origins 📝👶🛠️
onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com/doi/10.1002/...
The flexible, the stereotyped and the in‐between: putting together the combinatory tool use origins hypothesis
Tool use research has long made the distinction between tool using that is considered learned and flexible, and that which appears to be instinctive and stereotyped. However, animals with an inherite...
onlinelibrary.wiley.com
December 31, 2025 at 9:16 AM
I had the honour of working to bring @auersperga.bsky.social’s baby to life. It’s a VERY heavy baby - over 200 references (and yes I read them all) - but necessary to do justice to our new hypothesis of combinatory tool use origins 📝👶🛠️
onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com/doi/10.1002/...
Reposted by Jeroen Zewald
How do curiosity and surprise intersect following a violation of expectation? Read our paper here🔥
@auersperga.bsky.social @ivojacobs.bsky.social @elifduran.bsky.social
@auersperga.bsky.social @ivojacobs.bsky.social @elifduran.bsky.social
Physio-behavioral manifestations of 'surprise' in two parrot species: kea (Nestor notabilis) and Goffin's cockatoos (Cacatua goffiniana): doi.org/10.1098/rsos... #RSOS #cognition
December 29, 2025 at 11:37 PM
How do curiosity and surprise intersect following a violation of expectation? Read our paper here🔥
@auersperga.bsky.social @ivojacobs.bsky.social @elifduran.bsky.social
@auersperga.bsky.social @ivojacobs.bsky.social @elifduran.bsky.social
Reposted by Jeroen Zewald
Looking for a Postdoc position and have a background in bioacoustics and animal cognition? Interested in whether other animals might have something akin to language? Join our team: www.oeaw.ac.at/en/oeaw-home...
December 19, 2025 at 2:08 PM
Looking for a Postdoc position and have a background in bioacoustics and animal cognition? Interested in whether other animals might have something akin to language? Join our team: www.oeaw.ac.at/en/oeaw-home...
Reposted by Jeroen Zewald
Looking for a PhD at the intersection of animal cognition, acoustics & machine learning?
We offer 3 PhD projects at the Acoustics Research Institute (Vienna) and IT:U Linz:
Info: it-u.at/en/research/...
Apply: career.it-u.at/en/Job/73280
Deadline: Jan 31, 2026 | Start: Mar 2026
We offer 3 PhD projects at the Acoustics Research Institute (Vienna) and IT:U Linz:
Info: it-u.at/en/research/...
Apply: career.it-u.at/en/Job/73280
Deadline: Jan 31, 2026 | Start: Mar 2026
it-u.at
December 2, 2025 at 7:01 PM
Looking for a PhD at the intersection of animal cognition, acoustics & machine learning?
We offer 3 PhD projects at the Acoustics Research Institute (Vienna) and IT:U Linz:
Info: it-u.at/en/research/...
Apply: career.it-u.at/en/Job/73280
Deadline: Jan 31, 2026 | Start: Mar 2026
We offer 3 PhD projects at the Acoustics Research Institute (Vienna) and IT:U Linz:
Info: it-u.at/en/research/...
Apply: career.it-u.at/en/Job/73280
Deadline: Jan 31, 2026 | Start: Mar 2026
Reposted by Jeroen Zewald
Vienna dog owners! Clever Dog Lab researchers and I have new study for your pups to participate in😊
Only need one visit to the lab to play with their favorite toy😍
Email to participate today! [email protected]
@asommese.bsky.social
Only need one visit to the lab to play with their favorite toy😍
Email to participate today! [email protected]
@asommese.bsky.social
November 25, 2025 at 7:00 PM
Vienna dog owners! Clever Dog Lab researchers and I have new study for your pups to participate in😊
Only need one visit to the lab to play with their favorite toy😍
Email to participate today! [email protected]
@asommese.bsky.social
Only need one visit to the lab to play with their favorite toy😍
Email to participate today! [email protected]
@asommese.bsky.social
Reposted by Jeroen Zewald
second PhD position is on social and ecological cognition in wild Assamese macaques at our long-term field site in the beautiful Phu Khieo Wildlife Sanctuary, Thailand
👉 tinyurl.com/ypefnbxp
⏰ deadline 20 Dec 2025
👉 tinyurl.com/ypefnbxp
⏰ deadline 20 Dec 2025
Stellenanzeigen - Georg-August-University Göttingen
Website of the Georg-August-University Göttingen
tinyurl.com
November 25, 2025 at 8:25 PM
second PhD position is on social and ecological cognition in wild Assamese macaques at our long-term field site in the beautiful Phu Khieo Wildlife Sanctuary, Thailand
👉 tinyurl.com/ypefnbxp
⏰ deadline 20 Dec 2025
👉 tinyurl.com/ypefnbxp
⏰ deadline 20 Dec 2025
Reposted by Jeroen Zewald
First PhD position is on the evolutionary basis of empathy using infrared thermography in Barbary macaques at Affenberg Salem, southern Germany
👉 tinyurl.com/2e8wzkfz
⏰ deadline 20 Dec 2025
👉 tinyurl.com/2e8wzkfz
⏰ deadline 20 Dec 2025
Stellenanzeigen - Georg-August-Universität Göttingen
Webseiten der Georg-August-Universität Göttingen
tinyurl.com
November 25, 2025 at 8:25 PM
First PhD position is on the evolutionary basis of empathy using infrared thermography in Barbary macaques at Affenberg Salem, southern Germany
👉 tinyurl.com/2e8wzkfz
⏰ deadline 20 Dec 2025
👉 tinyurl.com/2e8wzkfz
⏰ deadline 20 Dec 2025
Reposted by Jeroen Zewald
We kindly invite every PhD candidate to present their research to the CoBeNe community at the PhD academy. It is an excellent opportunity to practice presenting in a friendly environment and receive input on the topic.
Abstract Submission Deadline: 01.12.2025!
ufind.univie.ac.at/en/course.ht...
Abstract Submission Deadline: 01.12.2025!
ufind.univie.ac.at/en/course.ht...
November 26, 2025 at 9:28 AM
We kindly invite every PhD candidate to present their research to the CoBeNe community at the PhD academy. It is an excellent opportunity to practice presenting in a friendly environment and receive input on the topic.
Abstract Submission Deadline: 01.12.2025!
ufind.univie.ac.at/en/course.ht...
Abstract Submission Deadline: 01.12.2025!
ufind.univie.ac.at/en/course.ht...
Reposted by Jeroen Zewald
Application deadline this Wednesday!!🦜
November 24, 2025 at 3:20 PM
Application deadline this Wednesday!!🦜
Reposted by Jeroen Zewald
📢 #Ethology2026 – A Double Event
Join us for:
• Ethologische Gesellschaft Annual Meeting, 18–21 Feb, Grünau
• DK Symposium: Cognition & Communication, 23–24 Feb, Vienna
A full week of ethology, cognition, and communication.
univie.eventsair.com/etho26-dkcog...
@ethoges.bsky.social @univie.ac.at
Join us for:
• Ethologische Gesellschaft Annual Meeting, 18–21 Feb, Grünau
• DK Symposium: Cognition & Communication, 23–24 Feb, Vienna
A full week of ethology, cognition, and communication.
univie.eventsair.com/etho26-dkcog...
@ethoges.bsky.social @univie.ac.at
November 17, 2025 at 12:47 PM
📢 #Ethology2026 – A Double Event
Join us for:
• Ethologische Gesellschaft Annual Meeting, 18–21 Feb, Grünau
• DK Symposium: Cognition & Communication, 23–24 Feb, Vienna
A full week of ethology, cognition, and communication.
univie.eventsair.com/etho26-dkcog...
@ethoges.bsky.social @univie.ac.at
Join us for:
• Ethologische Gesellschaft Annual Meeting, 18–21 Feb, Grünau
• DK Symposium: Cognition & Communication, 23–24 Feb, Vienna
A full week of ethology, cognition, and communication.
univie.eventsair.com/etho26-dkcog...
@ethoges.bsky.social @univie.ac.at
Reposted by Jeroen Zewald
July 9, 2025 at 3:57 PM
Reposted by Jeroen Zewald
Hi everyone, happy to share with all of you the paper from the second chapter of my PhD, where we show that more exploratory birds use a broader foraging niche, linking consistent behavior with ecological flexibility. I hope you can enjoy it and share it!!!
onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com/doi/10.1111/...
Exploration Behavior Is Consistent and Associated With Foraging Behavior in Island Songbirds
We tested the neophobia threshold hypothesis in six landbird species, including four Darwin's finches. Exploration behavior was consistent over time and contexts, with species exhibiting greater fora....
onlinelibrary.wiley.com
July 10, 2025 at 3:13 PM
Hi everyone, happy to share with all of you the paper from the second chapter of my PhD, where we show that more exploratory birds use a broader foraging niche, linking consistent behavior with ecological flexibility. I hope you can enjoy it and share it!!!
onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com/doi/10.1111/...
Reposted by Jeroen Zewald
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 🐺🐶😊
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 🐺🐶😊
June 23, 2025 at 12:26 PM
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 🐺🐶😊
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
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...
(paper, 2021) royalsocietypublishing.org/doi/full/10....
vía @zewaldj.bsky.social
(blog) www.forbes.com/sites/grrlsc...
June 21, 2025 at 5:47 PM
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...
(paper, 2021) royalsocietypublishing.org/doi/full/10....
vía @zewaldj.bsky.social
(blog) www.forbes.com/sites/grrlsc...
Reposted by Jeroen Zewald
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
June 19, 2025 at 11:25 PM
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
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...
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
June 15, 2025 at 6:20 PM
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...
Deadline is 29th June - please share widely!
www.bristol.ac.uk/jobs/find/de...
Reposted by Jeroen Zewald
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
The behavior—never before seen in birds—may be a developing cultural tradition among one population: scim.ag/4kIi12G
June 7, 2025 at 2:08 PM
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
The behavior—never before seen in birds—may be a developing cultural tradition among one population: scim.ag/4kIi12G
Reposted by Jeroen Zewald
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...
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
June 7, 2025 at 2:16 PM
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...
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...