🚨 new paper out!
In this paper Bernice Sepers, Tjomme van Mastrigt, @christanioo.bsky.social and @keesvanoers.bsky.social show that an increased yolk testosterone decreases begging behavior and emphasized sex differences in body mass in great tit chicks.

https://onlinelibrary.wiley.com/doi/10.1111/mec.17647