Kahuli are called tree-shells in English. They're snails that make noises like crickets.
(Song of the Tree-shell)
Kahuli lei ula,
Ki'i ka wai,
A dainty song-wreath,
Wreath of the akolea fern.
Fetch me some dew,
Dew from the pink akolea fern.
Kahuli are called tree-shells, which are snails (pictured) that make noises like crickets.
Akolea is a type of long growing fern
Kolea is a red-breasted bird of the plover family
This song and illustration comes from a book from 1909 called Unwritten Literature of Hawaii
The Sacred Songs of the Hula by Nathaniel Bright Emerson. Click the link to access the book online at Project Gutenberg.