From ErfWiki

Speculation

Archers are a type of Unit (as in "archer-class infantry").^Erf-b1-p077a. An archer uses a bow and arrows as its weapon.

Woodsy^Erf-b1-p057 and Shady Elves, as well as Men, all have archers. While men have other unit types, it is possible (though unclear) that Woodsy and/or Shady Elves only have archer units, or that all such elves are naturally archers as a natural ability. It is likely, though not supported directly via the comic, that Shady and especially Woodsy elves are superior archers to all others. (As this is a common feature of such units in other games).