li . ▁ ▁Distribution ▁and ▁habitat ▁ ▁The ▁cr ested ▁sp ider ▁orch id ▁was ▁thought ▁to ▁be ▁ext inct ▁when ▁no ▁spec im ens ▁were ▁seen ▁after ▁a ▁collection ▁made ▁in ▁ 1 9 3 2 . ▁Pl ants ▁found ▁in ▁ 1 9 7 7 ▁were ▁initially ▁thought ▁to ▁be ▁C . ▁crist ata ▁but ▁were ▁later ▁recogn ised ▁as ▁a ▁new ▁species , ▁Cal aden ia ▁vo ig ti i . ▁Spec im ens ▁were ▁found ▁near ▁Mil ing ▁nine ▁years ▁later ▁and ▁the ▁species ▁is ▁now ▁known ▁to ▁occur ▁between ▁P ith ara , ▁W ong an ▁Hills ▁and ▁W ath ero o ▁in ▁the ▁Av on ▁Whe at b elt ▁and ▁Ger ald ton ▁Sand pla ins ▁bi oge ographic ▁regions , ▁growing ▁on ▁higher ▁ground ▁above ▁salt ▁la kes ▁and ▁fl ats . ▁ ▁Conserv ation ▁Cal aden ia ▁crist ata ▁is ▁class ified ▁as ▁" P riority ▁One " ▁by ▁the ▁Western ▁Australian ▁Government ▁Department ▁of ▁Park s ▁and ▁Wild life , ▁meaning ▁that ▁it ▁is ▁known ▁from ▁only ▁one ▁or ▁a ▁few ▁locations ▁which ▁are ▁potentially ▁at ▁risk . ▁Sur ve ys ▁carried ▁out ▁by ▁volunte ers ▁in ▁ 2 0 1 1 ▁located ▁ 9 3 2 ▁plants ▁at ▁three ▁of ▁the ▁previously ▁known ▁populations , ▁but ▁ 8 6 7 ▁were ▁at ▁a ▁single ▁location ▁and ▁none ▁was ▁found ▁at ▁the ▁other ▁three . ▁The ▁main ▁thre ats ▁to ▁the ▁population ▁are ▁rising ▁sal inity , ▁gra zing ▁by ▁rabb its ▁and ▁go