For an arboreal species such as the orangutan, the heavier body of the mature male also limits which trees and branches can be accessed for food.

• 像红毛猩猩这样的树栖物种，成熟雄性的庞大体型是个负数，因为可以承载牠们体重的树木与枝条不多，限制了牠们觅食的机会。