Source : Webster's Revised Unabridged Dictionary (1913)

Percher \Perch"er\, n. [From {Perch}, v. i.]
   1. One who, or that which, perches. --J. Burroughs.

   2. One of the Insessores.

   3. [From {Perch} a pole.] A Paris candle anciently used in
      England; also, a large wax candle formerly set upon the
      altar. [Obs.] --Bailey.

Source : WordNet®

percher
     n 1: a person situated on a perch
     2: a bird with feet adapted for perching (as on tree branches);
        this order is now generally abandoned by taxonomists [syn:
         {Insessores}, {order Insessores}, {perching bird}]