[1] Massey Univ, Inst Nat & Math Sci, Ecol Behav & Conservat Grp, North Shore Mail Ctr, Auckland, New Zealand
[2] Auckland War Mem Museum, Auckland, New Zealand
[3] Univ Canterbury, Sch Biol Sci, Christchurch 1, New Zealand
[4] CUNY Hunter Coll, Dept Psychol, New York, NY 10021 USA
[5] CUNY, Grad Ctr, New York, NY USA