Note : Marsupials (kangaroos, koalas) produce two types of milk simultaneously – one for a newborn in the pouch, another for an older joey outside.
(whales, dolphins, manatees)
Unique fact : The platypus and echidna (monotremes) lack nipples; milk is secreted from pores in the abdomen, and young lap it from fur or skin. animals breastfeeding
(kangaroos, wallabies)
| Aspect | Human | Most Non-Human Mammals | |----------------------|-----------------------------|------------------------------| | Purpose | Nutrition + immunity | Same + rapid growth | | Frequency | 8–12x/day (newborn) | Varies (rabbits 2x/day, apes on-demand) | | Duration of nursing | Months to years (6m–2y+) | Days (some rodents) to years (elephants, whales) | | Milk let-down | Emotional/physical | Often triggered by calf nudging or vocalization | | Weaning | Gradual, child-led possible | Often abrupt (mother stops allowing access) | Note : Marsupials (kangaroos, koalas) produce two types