Black-bellied Plover and Semipalmated Plover – A Splendid Bird in Costa Rica (April 2026) 灰斑鸻和半蹼鸻 – 哥斯达黎加的美丽鸟 (2026 年 4 月）

The Black-bellied Plover (Pluvialis squatarola) and the Semipalmated Plover (Charadrius semipalmatus) are both migratory shorebirds commonly found in coastal mudflats, sandy beaches, estuaries, and intertidal wetlands. They rely on keen eyesight to locate prey, feeding mainly on insects, crustaceans, mollusks, and other small invertebrates. The Black-bellied Plover is larger, with a longer bill and legs; breeding males have a distinctive black belly and are often found on open mudflats. The Semipalmated Plover is smaller, with a short, stout bill, orange-yellow legs, and a prominent black breast band, favoring sandy beaches and shorelines. Both species depend on healthy wetland ecosystems and undertake long-distance migrations across the Americas.

灰斑鸻（Black-bellied Plover，Pluvialis squatarola）和半蹼鸻（Semipalmated Plover，Charadrius semipalmatus）都是迁徙性滨鸟，常见于沿海泥滩、沙滩、河口和潮间带湿地。两者均以视觉搜寻猎物，主要捕食昆虫、甲壳类、软体动物及其他小型无脊椎动物。灰斑鸻体型较大，具有较长的鸟喙和腿，繁殖羽雄鸟腹部呈黑色，常见于开阔泥滩。半蹼鸻体型较小，拥有短而粗的鸟喙、橙黄色腿和明显的黑色胸带，主要活动于沙滩和沙洲。两者均依赖湿地生态系统，是美洲重要的迁徙鸟类。