The Scarlet Robin lives in open forests and woodlands in Australia.
The Scarlet Robin feeds mainly on insects and forages on or near the ground. It will sit on a perch and fly down to catch prey.
Scarlet Robins form permanent monogamous pairs that maintain territories year round. The male advertises and defends the territory by singing from high, prominent perches. During the breeding season, the female selects a suitable, well-hidden nest site in a tree fork and builds a compact open cup nest. Nest materials include bark, grass, twigs and other plant materials; the nest is bound with spider web, lined with animal fibres or plant-down and camoflaged with moss or lichen. The female incubates the eggs while the male feeds her. Both sexes feed the nestlings, and will continue to feed the young for some time once fledged.