Axelle Delaunay

Sibling interference in mother–offspring interactions reveals jealous reactions in wild baboons Abstract. Whether non-human animals can experience complex emotions like jealousy remains debated. In humans, jealousy is particularly salient in sibships,

So happy to share that my last PhD chapter is finally out in Proc. B! We looked at chacma baboon offspring interference in grooming sessions between their mom and siblings, and asked whether these behaviours could represent jealous reactions.

royalsocietypublishing.org/rspb/article...

Please repost: 🚨Field assistant position 🐧

We offer a 14-months field assistant position through the French Polar Institute to work on king penguin ecophysiology and behavioral ecology.

Requirements: EU citizen < 30yo having experience with harsh fieldwork & wild bird/mammal handling/sampling.

📢 Calling all primatologists 📢

EFP2026 in Montpellier is now open for abstracts & registration!

🗓 Deadline for abstract : 13 March 2026 (before if mobility grant application)

Submit: www.alphavisa.com/efp/2026/abs...

Register: www.alphavisa.com/efp/2026/reg...

All abstracts will be accepted!

Not all sexual swellings signal fertility. Some signal strategy. In our new Current Biology paper, we show how gelada females “fake it” during male takeovers—and why it works.
authors.elsevier.com/a/1m7%7E93QW...

Each dyad (a, b) moves through four discrete states over time, represented by coloured circles. The dyad remains in a given state for a certain duration, or "holding time", before transitioning to a new state according to state-specific transition probabilities, indicated by arrows showing all possible (non-zero) transitions. Paintings by Sofia M. Pereira & Judith von Nordheim.

New paper!

We propose a framework to empirically study animal social relationships by modelling social network (SN) data as time-series—that is, without the need to aggregate them over time.

www.biorxiv.org/content/10.1...

Wild female gorillas live long after their last baby is born.

Do they go through menopause?

https://www.pnas.org/doi/10.1073/pnas.2510998122

Multi-generational vulture nests hold 700 years of human artifacts Crossbow bolts, sandals, slingshots, and more.

super cool study found human artifacts in Bearded vulture nests, incl. "weaponry like a crossbow bolt and wooden lance, decorated sheep leather, and parts of a slingshot....a shoe made from twigs and grass is ~675-years-old." link to paper: doi.org/10.1002/ecy..... www.popsci.com/environment/... 🧪🌍🦉

Age- and sex-dependent associations between the number of older siblings and early-life survival in pre-industrial humans | Proceedings of the Royal Society B: Biological Sciences Siblings are an important part of an individual’s early-life environment and may therefore play an important role in shaping an individual’s survival. The quantification of sibling effects on survival is challenging, however, especially in long-lived ...

1. My first ever paper is out! With
@euantheyoung.bsky.social
@lummaalab.bsky.social
@erikpostma.bsky.social
@hannahdugdale.bsky.social
How do older siblings, and their sex and age, affect the survival of younger siblings? Find out by checking below.

royalsocietypublishing.org/doi/full/10....

Female mountain gorillas can outrank males twice their size...

...and exhibit priority of access to resources over these males

Article: https://www.sciencedirect.com/science/article/pii/S0960982225008723

Press release:
https://www.mpg.de/25119311/0730-evan-it-s-not-just-about-size-150495-x

I would like to be added please! Thank you so much for creating this!