New Zealand Falcon
Falco novaeseelandiae
The forms of the New Zealand falcon differ in size, colouration, and habitat. The eastern falcon is larger and paler, while the bush falcon is smaller and darker. The southern falcon sits between the other forms in colouration and size, but has a habitat more similar to the bush falcon. The eastern falcon on average has more white tail bars in their tail feathers than the other two forms. The bush falcon primarily lives in forests while the eastern falcon is present in open steppe habitats. The bush falcons have shorter wings with better manoeuvrability within forests.
ID text from Wikipedia, CC BY-SA 4.0
Red-throated Caracara
Ibycter americanus
Males average 20.1 in (51 cm) long, while females average 22.1 in (56 cm); they are distinguished from the black caracara by larger size and plumage that is mainly black, with the belly, tail feathers, and undertail feathers being white. Both their faces and throats are bare, with a few black feathers scattered on the throat; the exposed skin is red. Both male and female red-throated caracaras are similar in appearance. Males have a wing length of 35.55 cm, a tail length of 24.96 cm, a bill length of 2.5 cm, and a tarsal length of 5.41 cm. Females have a wing length of 35.
ID text from Wikipedia, CC BY-SA 4.0
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