Both Aola Richards[1] and Meyer-Rochow and Liddle[2] had previously recorded a species of harvestman in caves at Waitomo feeding on glow-worms which they identified as Megalopsalis tumida (now considered a synonym of Forsteropsalis fabulosa).

[3] The New Zealand glow-worm (Arachnocampa luminosa) is a species of midge, whose larvae luminesce to lure flying insects into sticky silken threads.

Harvestmen species like F. photophaga and F. bona have been observed extracting glow-worm larvae from their silken nests on the cave roof, without being entangled in sticky threads.

[1][2] Both males and females of F. photophaga have plumose setae on their pedipalps, the adhesive properties of which may help capture glow-worm larvae, pupae, and adults.

[3][5] New Zealand harvestmen are eaten by various vertebrate species, including introduced mammals (possums, hedgehogs, rats, stoats), bats, birds, frogs, tuatara, and fish (kōaro).