Wandoo (Eucalyptus wandoo) woodland with Sandplain Poison (Gastrolobium microcarpum) understorey.

Herein lies an important part of the reason Dryandra Woodland reserve is a special place for the conservation of mammals in southern Australia.
Scattered widely through the wandoo woodland are extensive groves of the shrub known as Sandplain Poison.
It is a member of the pea family and the poison reference is to its content of sodium fluoroacetate, commonly known as 1080.
Because of the abundance of the shrub, 1080 permeates the food chain. Native animals are well-adapted to it, but predatory, introduced European Red Foxes and Feral Cats are highly susceptible.
Its presence in the food chain means these predators are scarce in Dryandra Woodland, so that a number of small-medium mammals that were once widespread have survived here.
These include the Numbat ( https://en.wikipedia.org/wiki/Numbat ), Brush-tailed Bettong or Woylie ( https://en.wikipedia.org/wiki/Woylie ), Red-tailed Phascogale and Tammar Wallaby.
(Of these we saw only the Woylie)