Permeability Describes the degree in which a railway allows wildlife to move
freely across it.
Probability of detection Probability of a carcass being present on a railway (or
road) being detected by an observer.
Probability of removal Probability of a carcass being removed (or consumed)
from the railway, usually by scavengers.
Propagule pressure A measure of the number of individuals introduced and the
number of introduction events that took place. Generally, the higher propagule
pressure is, the higher the likelihood of establishment will be.
Wildlife pass/passage Designated place for wildlife to safely cross the railway.
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Glossary