Spix’s Guan and Gray-headed Chachalaca -Splendid Birds in Costa Rica (April 2026) 棕胸冠雉和灰头小冠雉 – 哥斯达黎加的美丽鸟 (2026 年 4 月）

The Spix’s Guan (Penelope jacquacu) and Gray-headed Chachalaca (Ortalis cinereiceps) are medium-to-large members of the guan family (Cracidae) found in Costa Rica. Both are primarily arboreal, feeding on fruits, seeds, flowers, and leaves, and play an important role in seed dispersal.

However, the Spix’s Guan prefers mature lowland rainforests and has dark brown plumage with fine white spotting and a reddish throat dewlap. The Gray-headed Chachalaca is more adaptable, inhabiting forest edges, secondary growth, and dry forests. It has a gray head, olive-brown body, and a long tail, and is best known for its loud, chorus-like calls at dawn and dusk.

棕胸冠雉（Penelope jacquacu）和灰头小冠雉（Ortalis cinereiceps）都属于凤冠雉科（Cracidae），是哥斯达黎加常见的中大型林栖鸟类。两者大多生活在树上，以果实、种子、花朵和嫩叶为食，在森林生态系统中都是重要的种子传播者。

不过，它们在外形、栖息环境和行为上有所不同。斯氏冠雉主要栖息于成熟的低地热带雨林，体羽深褐色，布满细小白色斑点，喉部具有显著的红色肉垂，体型较大，行动较为隐蔽。灰头小冠雉则适应能力更强，常见于森林边缘、次生林及干旱林地，具有灰色头部、橄榄褐色身体和细长尾羽。它最出 名的特征是黎明和黄昏时发出的响亮、合唱般的鸣叫声，常常是森林中引人入胜的天籁之音。