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Bornean orangutans lead a predominantly solitary existence, seldom congregating in groups. Males, as the dispersing sex, depart from their birthplaces upon attaining sexual maturity (typically at 10–12 years old) to establish expansive territories spanning several hundred hectares. Female territories are comparatively smaller, their actual size influenced by forest composition and food resource availability. These orangutans reproduce at a slow pace, typically giving birth to one offspring every 6–8 years, a factor contributing to their heightened vulnerability to hunting pressures. Female sexual maturity is attained at 10–15 years old (Kingsley 1981).

Bornean orangutans lead a predominantly solitary existence, seldom congregating in groups. Males, as the dispersing sex, depart from their birthplaces upon attaining sexual maturity (typically at 10–12 years old) to establish expansive territories spanning several hundred hectares. Female territories are comparatively smaller, their actual size influenced by forest composition and food resource availability. These orangutans reproduce at a slow pace, typically giving birth to one offspring every 6–8 years, a factor contributing to their heightened vulnerability to hunting pressures. Female sexual maturity is attained at 10–15 years old (Kingsley 1981).