insessorial

in·ses·so·ri·al

I0161600 (ĭn′sĕ-sôr′ē-əl)adj. Perching or adapted for perching: insessorial claws.
[From New Latin Īnsessōrēs, the perchers (former order name), from Latin īnsessus, past participle of īnsidēre, to sit upon; see insidious.]

insessorial

(ˌɪnsɛˈsɔːrɪəl) adj1. (Zoology) (of feet or claws) adapted for perching2. (Zoology) (of birds) having insessorial feet[C19: from New Latin Insessōrēs birds that perch, from Latin: perchers, from insidēre to sit upon, from sedēre to sit]