One of the students in class this semester included this gem in his paper. In case you didn't know the true value of a caribou, it's right here:
Sums it all up, doesn't it? :)
...from Ben Abdallah, S., & Lasserre, P. (2012). A
Real Option Approach to the Protection of a Habitat Dependent Endangered
Species.Resource And Energy Economics, 34(3), 295-318.