Appearance
The plumage is dark grey-black overall with a pale area on the belly and breast and pale streaking on the upperparts. They are sexually dimorphic, with males having darker plumage than the females and being slightly larger.Food
The North Island robin, like the South Island robin, is a terrestrial feeder foraging on or near the ground . Prey items are located by perch-hunting, where an individual waits at an elevated perch until prey is spotted, or by active searching; prey is taken from the leaf-litter, low vegetation and tree trunks. Numerous invertebrate prey is taken, including cicadas, earthworms, wetas, snails, and spiders. Fruit is also taken. North Island robins cache food supplies for later when prey is plentiful, although males cache more food than females do. Both sexes will steal food from their mate's cache, and are less likely to cache food if their mate is present.References:
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