From RWP Wiki
Necky is a baddy in the Donkey Kong series.
Neckies are large vultures.
In the Games
Donkey Kong Country
In Donkey Kong Country, Neckies appear relatively frequently. There are three main types: Neckies that stand in one spot and toss coconuts in an arc at Donkey and Diddy Kong, Neckies that fly at them, and Mini-Neckies.
Donkey Kong Land
In Donkey Kong Land, Neckies reappear, identical to their previous appearance.