Question

the smallest flightless songbird in the world extinct (name it)

Answer 1

Stephens Island wren was the only flightless and the smallest songbird in the world

Answer 2

Stephens Island wren was the only flightless and also the smallest songbird in the world.

Although it is extinct now.

This belongs to the family of Acanthisittidae, which is the New Zealand wrens.

These flightless birds are claimed to be a species that was discovered and driven extinct by a single creature.