Species+Distribution+Modeling

Existing Software Packages
Maxent - software for species habitat modeling that uses a correlative approach to determine the extent of available habitat for a species. Uses a correlative approach by evaluating environmental conditions at known species locations to identify similar conditions across the landscape. Maxent in unique in that it uses a maximum entropy algorithm to evaluate habitat using presence-only data.

RAMAS - software to perform population viability analyses (PVA).