Kōkako is an endangered forest bird which is endemic to New Zealand. It is slate-grey with wattles & a black mask. It is one of three species of New Zealand Wattlebird, the other two being the near threatened Tieke (saddleback) & the extinct Huia.
Kiwi birds lay the largest egg in proportion to its body. The egg is equivalent to of the bird’s body mass. To compare, ostrich’s egg is equivalent to of the mother’s body mass, while a newborn human accounts only for of the mother’s body mass.
Kiwi are flightless birds endemic to New Zealand. At around the size of a domestic chicken, kiwi are by far the smallest living ratites and lay the largest egg in relation to their body size of any species of bird .