In·ses·sor n.; pl. Insessores   Zool. One of the Insessores. The group includes most of the common singing birds.
  ◄ ►
  In·ses·so·res n. pl.  Zool. An order of birds, formerly established to include the perching birds, but now generally regarded as an artificial group.
  ◄ ►
  Insessores
       n : a bird with feet adapted for perching (as on tree branches);
           this order is now generally abandoned by taxonomists
           [syn: order Insessores, perching bird, percher]