Red-capped Robin
Petroica goodenovii
The smallest of the red robins, the red-capped robin is 10.5–12.5 cm (4.1–4.9 in) long with a wingspan of 15–19.5 cm (5.9–7.7 in), and weighs around 7–9 g (0.25–0.31 oz). Males and females are of similar size. It has longer legs than the other robins of the genus Petroica. The male has a distinctive scarlet cap and breast. Its upperparts are jet-black with white shoulder bars, and its tail is black with white tips. The underparts and shoulder are white. All colours are sharply delineated from one another.
ID text from Wikipedia, CC BY-SA 4.0
Tomtit
Petroica macrocephala
The tomtit is a small (13 cm, 11 g) bird with a large head and a short bill. The male North Island subspecies has black head, back, wings (with a white wing-bar), and a white belly. The subspecies from South Island, the Chatham Islands, and Auckland Islands are similar, but have a yellow band across the breast between the black head and white belly. The females are brown instead of black. The Snares Island subspecies is entirely black, and is known as the black tit.
ID text from Wikipedia, CC BY-SA 4.0

Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Red-capped Robin and Tomtit.