A common species, it grows in dense, shrubby forest and in winter-wet swamps.

Flowering occurs from September to November, more prolifically after fire the previous summer.

[2][3][4] Eriochilus tenuis was first formally described in 1840 by John Lindley and the description was published in A Sketch of the Vegetation of the Swan River Colony.

[3] The slender bunny orchid grows in winter-wet swamps and in moss beds on granite outcrops between Perth and Albany.

[2][3][4][7] Eriochilus tenuis is classified as "not threatened" by the Western Australian Government Department of Parks and Wildlife.