Basal metabolic rate in the context of "Thyroid"

The kākāpō (Māori: [ˈkaːkaːpɔː]; pl.: kākāpō; Strigops habroptilus), sometimes known as the owl parrot or flightless parrot, is a species of large, nocturnal, ground-dwelling parrot of the superfamily Strigopoidea. It is endemic to New Zealand.

Kākāpō can be up to 64 cm (25 in) long. They have a combination of unique traits among parrots: finely blotched yellow-green plumage, a distinct facial disc, owl-style forward-facing eyes with surrounding discs of specially-textured feathers, a large grey beak, short legs, large blue feet, relatively short wings and a short tail. It is the world's only flightless parrot, the world's heaviest parrot, and also is nocturnal, herbivorous, visibly sexually dimorphic in body size, has a low basal metabolic rate, and does not have male parental care. It is the only parrot to have a polygynous lek breeding system. It is also possibly one of the world's longest-living birds, with a reported lifespan of up to 100 years. Adult males weigh around 1.5–3 kilograms (3.3–6.6 lb); the equivalent figure for females is 0.950–1.6 kilograms (2.09–3.53 lb).