ABSTRACT In New Guinea Palm Cockatoos, Pesquet’s Parrots and Eclectus Parrots are potentially threatened by deforestation and hunting. In a 28-month study, we found 51 Palm Cockatoo, 34 Pesquet’s Parrot and 71 Eclectus Parrot nests. Eclectus Parrots used taller, larger, live trees. Palm Cockatoos preferred hollows in broken trunks having deeper hollows with larger entrances. Pesquet’s Parrots excavated their nest hollows in dead trees. Palm Cockatoos nested at lower density (0.008 nests/ha) than Pesquet’s (0.022 nests/ha) and Eclectus Parrots (0.069 nests/ha). Palm Cockatoos and Pesquet’s Parrots appeared to breed seasonally; Eclectus Parrots bred at higher frequency year-round. Palm Cockatoo clutch size was one; Pesquet’s and Eclectus Parrots clutches had one to two eggs. Eclectus Parrots had higher fledging success: 54%, compared with 40% of Palm Cockatoo and 17% of Pesquet’s Parrot eggs. Predation caused most nest failures for Palm Cockatoos and Eclectus Parrots; starvation caused most loss in Pesquet’s Parrots. Humans hunted Palm Cockatoos and Pesquet’s Parrots, not Eclectus Parrots. Higher nest tree density, breeding success, and more generalised feeding habits may make Eclectus Parrots the least vulnerable of the three species. Low population density and breeding frequency of Palm Cockatoos and Pesquet’s Parrots may make them more vulnerable.

中文翻译：

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新几内亚三只大型热带雨林鹦鹉的繁殖生物学：棕榈鹦鹉、佩斯凯鹦鹉和折衷鹦鹉

摘要 在新几内亚棕榈凤头鹦鹉中，Pesquet's Parrots 和 Eclectus Parrots 可能受到森林砍伐和狩猎的威胁。在一项为期 28 个月的研究中，我们发现了 51 只棕榈鹦鹉、34 只 Pesquet 鹦鹉和 71 只 Eclectus 鹦鹉巢。折衷鹦鹉使用更高、更大的活树。棕榈凤头鹦鹉更喜欢破碎树干中的空洞，它们的空洞更深，入口更大。Pesquet's Parrots 在枯树上挖掘巢穴。棕榈凤头鹦鹉的筑巢密度（0.008 巢/公顷）低于 Pesquet 的（0.022 巢/公顷）和折衷鹦鹉（0.069 巢/公顷）。Palm Cockatoos 和 Pesquet's Parrots 似乎是季节性繁殖的；折衷鹦鹉全年繁殖频率更高。Palm Cockatoo 手拿包尺寸为一；Pesquet's 和 Eclectus Parrots 手拿有一到两个鸡蛋。Eclectus Parrots 的成功率更高：54%，相比之下，40% 的 Palm Cockatoo 和 17% 的 Pesquet's Parrot 蛋。捕食导致棕榈凤头鹦鹉和折衷鹦鹉的大多数筑巢失败；Pesquet's Parrots 的主要损失是饥饿造成的。人类猎杀棕榈凤头鹦鹉和 Pesquet's Parrots，而不是 Eclectus Parrots。更高的巢树密度、繁殖成功和更普遍的饮食习惯可能使折衷鹦鹉成为三个物种中最不脆弱的。Palm Cockatoos 和 Pesquet's Parrots 的低人口密度和繁殖频率可能使它们更加脆弱。更普遍的饮食习惯可能使折衷鹦鹉成为三个物种中最不脆弱的。Palm Cockatoos 和 Pesquet's Parrots 的低人口密度和繁殖频率可能使它们更加脆弱。更普遍的饮食习惯可能使折衷鹦鹉成为三个物种中最不脆弱的。Palm Cockatoos 和 Pesquet's Parrots 的低人口密度和繁殖频率可能使它们更加脆弱。