New Zealand Robin - Diagnosis

Diagnosis

(P. australis) are small, 10–18 cm, and weigh around 35g. North Island robins do resemble both females and juveniles of the South Island robins, as well as all the Stewart Island robins, which can sometimes make it difficult to distinguish between the three, with the exception of its geographic location. The females and juveniles within a particular group of robins look similar to each other except newly independent juveniles may not yet have the more lightly colored breast patch. However, North Island males are almost black with a white spot just above the beak as well as the grayish-white lower breast. Females and juveniles are grayer with more variable pale patches on their breasts and throats. The South Island males are dark gray except for the distinct yellowish white lower chest, while females and juveniles are again lighter gray with a less distinct breast. Finally, Stewart Island robins look similar to North Island robins (males and females).