The redpoll (Acanthis flammea) is a species of small passerine bird in the finch family Fringillidae.

The redpoll was listed in 1758 by the Swedish naturalist Carl Linnaeus in the 10th edition of his Systema Naturae under the binomial name Fringilla flammea.

Molecular phylogenetic studies showed that it formed a distinct lineage, so it was moved to the resurrected genus Acanthis that had been introduced in 1797 by the German naturalist Moritz Balthasar Borkhausen.

[7][8][9] The genus name Acanthis is from Ancient Greek akanthis, a name for a small now-unidentifiable bird.

The three species are now considered as conspecific based on the small genetic differences and the continuous phenotypic variation.

[9][11][12] The redpoll is a small brownish-grey finch with dark streaks and a bright red patch on its forehead.

It is a partial migrant, moving southward in late autumn and northward again in March and April.