High resolution copy for first photo (habit). See "original" resolution.
Note: Many plants in this area - all with white or very pale pink flowers instead of the more common deep pink to magenta colour.
Butterfly was flying from flower to flower on the one plant, hovering with wings flapping rapidly while feeding, then moving on to the next plant. Flowers didn't appear to trigger. A few butterflies were seen doing this. Host plant here will be Tasmannia xerophila which is plentiful.
Trigger Plant in Grey River. Only found in a patch about 5 by 5 sqm, on the fire break behind house no 3. Unfortunately most of the flowers were removed when the grass in the fire break area was mowed. They may be Stylidium graminifolium.