Decreases in the abundance, distribution and diversity of animal species in recent decades have been widely documented as species have responded to land-use pressures such as urban expansion, the alteration of habitat structure from the spread of nonnative plants and climate change. The City of Boulder Open Space and Mountain Parks (OSMP) has been surveying butterfly communities in 18 transects in five different years. The goal of this document is to determine how butterfly communities have changed over time, with reference to habitat type, time, and their interaction.
