56431 is a Postal Code in Aitkin County.
56431 a.k.a. Tickell's leaf warbler: Tickell's leaf warbler is a leaf warbler found in Asia. The species has a yellowish underside and supercilium. Like other leaf warblers it feeds mostly on insects by gleaning and short sallies. An active bird, it prefers the canopy and can be difficult to track as it moves actively from branch to branch, acrobatically exploring the underside of leaves and twigs. The clear yellowish undersides and lack of a wing bar can be used to tell it apart from similar species.
- also known as 黄腹柳莺