BBC Knowledge June 2017

A parent flamingo, most likely
the father based on the adult bird’s
height, feeds its chick. Flamingos lay
a single, large, white, chalky egg and
raise one youngster per breeding
season, which occurs between May and
July. Both the male and female have
a role in nest building, egg incubation
and feeding. Flamingos secrete ‘milk’
from specialised cells that line their crop,
and feed their chick by dribbling
the protein-rich liquid into their
offspring’s beak. The milk is packed full
of carotenoids and quite literally drains
the parent birds of their pink colour.