The Peg-billed Finch is a long-tailed species, 13.5 cm long and weighing 16 g. It has a distinctive long upturned bill with a black upper mandible and yellow lower mandible. The adult male is slate grey, becoming paler on the belly. The female is olive-brown above, becoming paler below and with a grey tinge to the head and upper back. She has bright cinnamon wing bars and buff supercilia. Young birds are similar to the female, but have paler plumage and weaker wing bars.
The Peg-billed Sparrow is classified as Least Concern. Does not qualify for a more at risk category. Widespread and abundant taxa are included in this category.
Peg-billed Sparrow species Acanthisitta chloris (Sparrman, 1787) - Rifleman species Acanthistius brasilianus (Cuvier, 1828) species Acanthistius cinctus (Günther, 1859) - Yellowbanded Perch species Acanthistius fuscus Regan, 1913 species Acanthistius ocellatus (Günther, 1859) - Eastern Wirrah species Acanthistius pardalotus Hutchins, 1981 - Leopard Wirrah species Acanthistius patachonicus (Jenyns, 1840) species Acanthistius paxtoni Hutchins & Kuiter, 1982 - Orange-lined Wirrah species Acanthistius pictus (Tschudi, 1846) species Acanthistius sebastoides (Castelnau, 1861) - Koester species Acanthistius serratus (Cuvier, 1828) - Western Wirrah More