[1][2][3] The marsh crake is about half the size of a common blackbird, measuring about 15–18 cm (5.9–7.1 in) in length and weighing 30 to 40 g (1.1 to 1.4 oz).

It is known for its dramatic plumage: the feathers on its back are deep brown with black and white marks.

The species occurs in both the North and South island of New Zealand, but appears to be more numerous in the latter.

[1] Introduced species such as cats, dogs, mustelids, and rats can kill the adult birds, eggs, and chicks.

If human beings make too much noise near a nest, the parent birds may flee, leaving the eggs to die.