The National Wildlife Federation

Community Profile

Pledge Status


Pledge Date

Thursday, March 2, 2023

Program Year


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City of Thornton

Thornton, CO

Jan Kulmann


Pledge Summary

Thornton, Colorado, is a City of approximately 140,000 residents in the north Denver metro area, running south to north paralleling the beautiful Colorado Front Range. Thornton Mayor Jan Kulmann is committed to saving the monarch butterfly and other pollinators with the signing of the Mayors’ Monarch Pledge. She looks forward to continuing her engagement with residents in developing additional pollinator habitat throughout the City. To improve Monarch life cycle success, Mayor Kulmann has encouraged intentional maintenance practices designed for the restoration of pollinator habitat. These practices include reduction of pesticide use near milkweed in targeted locations and the innovative Naturally Thornton program, converting turfgrass into sustainable and native grasslands. In addition, Mayor Kulmann actively supports the citizen driven Monarch Fly Way initiative, which links City appropriate breeding habitat into a single unified habitat corridor, characterized by appropriate maintenance and public education.

Community Spotlight

Action Items Committed for 2023

Communications and Convening

  • Issue a Proclamation to raise awareness about the decline of the monarch butterfly and the species’ need for habitat.

Program and Demonstration Gardens

  • Host or support a native seed or plant sale, giveaway or swap.

Systems Change

  • Direct city property managers to consider the use of native milkweed and nectar plants at city properties where possible.