Nov 19, 2022 · Orangutan flanges are a physical feature signaling the testosterone level of male orangutans; this deters rivals and attracts females. Not all males develop these cheek pads, …

Nov 26, 2024 · The term “flanged orangutan” refers to a specific category of adult male orangutans found primarily in Borneo and Sumatra. Flanged orangutans are known for their …

Aug 24, 2021 · Flanged male orangutans tend to be much larger, and are generally preferred by females. While the development leading to the presence or absence of flanges is known, the …

This means that there are two “types” of mature male orangutans: flanged and unflanged males. A flanged male has big cheek pads on the sides of his face and a large pendulous throat sack …

There are two different types of adult male orang-utan: flanged and unflanged. Flanged males have prominent cheek pads called flanges and a throat sac used to make loud verbalizations …

Mar 6, 2025 · There are two distinct types of adult male orangutans: flanged and unflanged. Flanged males are larger, possessing distinctive cheek pads (flanges) and a throat pouch, …

Feb 9, 2024 · We found higher reproductive success by flanged males than by unflanged males, a pattern consistent with other Bornean orangutan (Pongo pygmaeus) paternity studies. …

Much is known about orangutan physiology and behavior. Yet there is one thing that is still unsolved – the exact reason why some male orangutans develop a flange while others do not.

Flanged adult male orangutans are the most solitary of all orangutan age/sex classes. Their participation in social groups is usually limited to temporary sexual “consortships” with adult …

Aug 27, 2017 · Why do some male orangutans have a flange – that big flap of skin around their faces – while others don’t? The answer is we probably know the why but only possibly the …