Monkeys have shown size does really matter when it comes to attracting the opposite sex.
Males with larger noses get more action, according to new research from Cardiff University, Kyoto University, Sabah Wildlife Department and Danau Girang Field Centre in Malaysia.
Yep, if you have exaggerated masculine traits, such as a big hooter, female monkeys are apparently more attracted to you.
Dr Ikki Matsuda, from Chubu University and Kyoto University in Japan, said: ‘In addition to finding that enlarged male noses serve as advertisements to females in mate selection, we also found that males with larger noses also tended to have larger body mass and testis.
‘This suggests that nose enlargement is a reliable predictor of social dominance and high sperm count.’
The researchers studied proboscis monkeys in the Lower Kinabatangan Wildlife Sanctuary, Yokohama Zoo, Singapore Zoo and Low Kawi Zoo in Borneo.
They looked at several elements that attracted females, including the correlations between body mass, facial characteristics, testicular volume and vocalizations.
Dr Benoit Goossens, director of Danau Girang Field Centre and reader at Cardiff University, added: ‘Every piece of information that allows us to better understand the behaviour of these charismatic animals is important.
‘Now our tour guides will be able to tell their guests that size matters, and that males with larger noses attract more females in their harem.’
The study Nasalization by Nasalis larvatus: larger noses audiovisually advertise conspecifics in proboscis monkeys is published in Science Advances.
It was supported by the Sime Darby Foundation.