Field keys for the birds that fool you

Two families that share the sky over the valley and almost nothing else. Sorted by wing and tail shape overhead — the birds that never seem to land.

The little brown jobs, un-blurred. A fixed order of questions — body type, then the streaked-vs-plain breast decoder — turns a beige smear into a name.

A dot circling high over the valley resolves faster than you'd think — sorted by silhouette, wing-hold, and size, the way you actually read one from below.

Drakes are the easy half. Sort dabbler, diver, or sawbill by shape and behaviour, then let head shape and bill crack the brown hens and eclipse birds the plates never quite show.

Adults sort on size, mantle shade, wingtip, and leg colour — the grey scale does most of it. Young gulls take years to grow up, so this keys the adults and shows you where the ceiling is.

Spring males give themselves up on face, wingbars, and how much yellow. Fall immatures are the famous trap — this keys the bright ones and flags where the drab ones stop keying.

The distinctive waders name themselves; the peeps and dowitchers are the hardest sight-ID knot there is. This keys what can be keyed — and says plainly where sight ID quits.

Kingbirds and phoebes name themselves; the little empids are the hardest ID in North America. Split by build, then led by voice — because a silent empid often can't be named at all.

Three genera sort the group in seconds; the work is all downstream — the near-identical Western/Clark's pair, and the dingy winter birds. Keyed by face and bill, with an honest “sp.” where it belongs.

Eight little birds that move as one restless flock — chickadees, nuthatches, kinglets, a creeper, a gnatcatcher. Keyed by how each one moves through the tree, because in a moving flock the behaviour reads before the plumage does.

Four builds sort the group on sight; the one real trap is Downy vs Hairy, where size is the mark that fails and the bill, tail, and proportions decide. Led by that decoder — with honest “sp.”, slash, and flicker-intergrade calls where they belong.

Blackbirds, grackles, meadowlarks, orioles. The males name themselves; the trap is the plain glossy-black bird — sorted by eye and tail — and the big streaky brown female, whose honest ceiling is “blackbird sp.”

The common core sorts on color and bill; the real hinges are the red-finch knot (House vs Cassin's, led by the bill, not the color) and the Wasatch rosy-finches that mob the high ski-area lots Nov–Apr and barely register in a countywide number.