Pink flamingo feeding crop milk to her young at the Oklahoma City Zoo at 2000 Remington Place in Oklahoma City, Oklahoma on November 8, 2019.
Flamingos produce bird milk through glands along the digestive tract. Young flamingos eat this milk until they have developed the mature filter-feeding apparatus in their bills to allow them to feed on solid food. It takes roughly two months for young flamingos to develop well enough to eat mature food, and until that time, they feed exclusively on crop milk.
NIKON CORPORATION NIKON D850, f/4 @ 500 mm, 1/640, ISO 320, No Flash
2019 Glenn Nagel