Passerine pokemon

I tried to pick species that suited an element, not necessarily those found in the Pacific Northwest. 

Warblur, the songbird pokemon
Warblur is a small normal-and-flying type pokemon from the Osai region. The annual arrival of migrating warblurs is an eagerly awaited event every autumn, as these wayfaring birds travel from all over the continent towards their wintering grounds in the far south. When flying at speed they are impossible to tell apart from one another - when they stop to rest, or are battled, their actual appearance can be gauged. Although their appearances vary widely, warblur are a single species of pokemon, though based on their temperament they select different ecological niches for themselves. Each warblur form has a unique song that helps it find a mate and compete for territory.

Yellow Form - [Birdsong] deals Electric damage and raises its own Attack by 1 step. Natures: Lonely, Brave, Adamant, Naughty

Blackpoll Form - [Birdsong] deals Ice damage and raises its own Defense by 1 step. Natures: Bold, Relaxed, Impish, Lax

Redstart Form - [Birdsong] deals Fire damage and raises its own Special Attack by 1 step. Natures: Modest, Mild, Quiet, Rash

Ovenbird Form - [Birdsong] deals Ground damage and raises its own Special Defense by 1 step. Natures: Calm, Gentle, Sassy, Careful

Chat Form - [Birdsong] deals deals Dark damage and raises its own Speed by 1 step. Natures: Timid, Hasty, Jolly, Naïve 

Cerulean Form - [Birdsong] deals Water damage and raises one of its stats randomly by 1 step. Natures: Hardy, Docile, Serious, Bashful, Quirky