This paper analyzes statistically the main determinants of government
decisions about the preservation of endangered species. As explanatory
variables, we use proxies that include 'scientific' species character
istics, such as ''degree of endangerment'' and ''taxonomic uniqueness,
'' as well as 'visceral' characteristics, such as ''physical size'' an
d the degree to which a species is considered a ''higher form of life.
'' These proxies are used to study the government's protection and spe
nding decisions on individual species. Overall, we find that the role
of visceral characteristics is much greater than the role of scientifi
c characteristics.