黑长脚鹬（学名：Himantopus novaezelandiae，毛利语：Kakī）是一种反嘴鹬科中的大形涉禽，是新西兰的特有种。成鸟约40厘米长。牠们的足红色而且相当长，并有一个黑色长而薄的喙及独有的混身黑色的羽毛。亚成鸟则有白色的胸、颈及头羽，唯独眼睛附近有黑色的羽色。
从有纪录开始其数目一直剧减，由过千只到1981年达纪录性的23只成鸟。量身订造的保育运动令其数量回复至相对健康的数目，但由于族群数目前仍未达致自行繁衍的阶段，因此IUCN仍将此种列为极危物种，表示其灭绝的威胁仍然未除。

The black stilt or kakī (Māori), Himantopus novaezelandiae, is found only in New Zealand, and is the world's rarest wading bird: less than 100 adults survive in the wild. Adult kakī have distinctive black plumage, very long red legs, and a long thin black bill. Black stilts currently breed only in the Mackenzie Basin in the South Island, and are threatened by introduced feral cats and ferrets, as well as habitat degradation from hydroelectric dams, agriculture, and invasive weeds.