No evidence for a heritable altruism polymorphism in Tibetan ground tits

Affiliations

• ¹ Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, 3032 Hinterkappelen, Switzerland; sacha.engelhardt@iee.unibe.ch.
• ² Behavioural Ecology and Physiological Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9700 CC Groningen, The Netherlands.
• ³ Department of Animal Sciences, Behavioural Ecology Group, Wageningen University & Research, 6700 AH Wageningen, The Netherlands.
• ⁴ Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, 3032 Hinterkappelen, Switzerland.