Decline of brown teal ( Anas chlorotis ) in Northland, New Zealand, 1988-99 | Notornis and Birds New Zealand

[摘要] Numbers of brown teal (Anas chlorotis) present at summer flock sites in Northland, New Zealand declined 65% during 1988-99 and the species' principal rangc contracted to three enclaves locatcd along 20 km of the eastern coast. Most populations underwent a period of pdual decline followed by an abrupt crash, symptomatic of prolonged recruitment failure. Drought-induced habitat and landscape change is proposed as an important agcnt of decline in two formerly large populations at Clendon Cove and Tutaernatai. Extirpation in Northland appears imminent.

[学科分类] 动物科学

[关键词] Anas chlorotis;brown teal;Northland: New Zealand;population;status