Thorleif Schjelderup-Ebbe, Norwegian zoologist and psychologist (born 1894)

Thorleif Schjelderup-Ebbe

Norwegian zoologist

Thorleif Schjelderup-Ebbe was a Norwegian zoologist and comparative psychologist. He was the first person to describe a pecking order of hens, a discovery that contributed to understanding dominance hierarchies across species and influenced the field of ethology.