Black-tailed treecreeper

The black-tailed treecreeper (Climacteris melanurus) is a species of bird in the family Climacteridae. It is endemic to north and northwestern Australia.

Its natural habitats are temperate forests and subtropical or tropical moist lowland forests.

Description
Both genders are dark brown and black-tailed. The male has a black throat while the female has a white throat.

Breeding
They participate in cooperative breeding, in which multiple individuals assist in raising young—not just the biological parents. They likely reach sexual maturity around 2 years old.