Albatross Chicks

Short answer: The grey-headed albatross (Thalassarche chrysostoma) is a mollymawk that breeds on islands in the Southern Ocean, with about half the world population on South Georgia. The IUCN lists it as Endangered.

According to the Agreement on the Conservation of Albatrosses and Petrels (ACAP), it usually breeds every other year. Eggs are laid in October, incubation averages 72 to 74 days, chicks hatch mostly in December, and they fledge in late April or May at about 116 to 145 days old. The single egg goes in a large mud-and-grass nest, typically on steep slopes or cliffs with tussock grass. At Bird Island, South Georgia, a British Antarctic Survey team used electronic weighing platforms under the nests to log chick mass every 10 minutes, nearly a million weighings in all. They found grey-headed parents delivered meals averaging 616 g, and with both parents foraging the chick got a meal about every 1.26 days. The diet is mostly squid, with some fish and crustaceans. Like other albatross chicks, they reach a peak mass well above adult weight, about 30% or more according to a 2000 study in Ibis, then slim down before fledging. Wikipedia, citing Bird Island studies, gives a peak of about 4.9 kg; adults average about 3.65 kg. The footage shows a grey downy chick on a pedestal nest above the sea, then a whiter, fluffier chick in tall tussock grass, illustrating albatross chicks at different stages or sites.