Ascendant numbering, on the other hand, allows for uniformity in the numbering of non-passerine primaries, as they almost invariably have four attached to the manus regardless of how many primaries they have overall.
Por outra parte, a numeración ascendente permite unha uniformidade na numeración das primarias dos non paseriformes, xa que estes teñen case invariablemente catro unidas á manus sen importar cantas primarias teñen en total.