Краснохвостый астрильд Glaucestrilda caerulescens

A tiny gray finch with a red tail and rump and a purplish bill. Male is bright silvery-gray all over with a pale throat and chest. Female is similar, but has darker underparts. Sometimes joins flocks with other small finches. Inhabits thickets in open areas such as hillsides and field edges. Call is a high, thin “see”, often given in series. Native to western Africa; introduced to Hawaii island, where it inhabits brushy and grassy areas.