Dichotomous Key/Passeriformes

1

 * Syrinx complexity
 * Very complex -
 * Simple -

2: Passeri

 * Number of fossa
 * One -
 * Two -

4: Corvida

 * Mimicking behavior
 * Yes -
 * No -

7: Corvida

 * Tongue texture
 * Brush tipped, bristly -
 * Smooth, or other -

9 - Corvida
Could be Atrichornithidae, Climacteridae, Maluridae, Pardalotidae, Petroicidae, Pomatostomidae, Cinclosomatidae, Neosittidae, Pachycephalidae, Dicruridae, Campephagidae, Oriolidae, Artamidae, Paradisaeidae, Corvidae, Corcorachidae, Irenidae, Laniidae, Vireonidae, Ptilonorhynchidae