Welcome to PollardBase

This is a data entry and management system for butterfly monitoring programs that follow protocols similar to those described by Ernie Pollard and have become known in the butterfly world as “Pollard Walks”. All these programs use trained volunteers who walk set routes multiple times during each season and over several years. If you are not already a volunteer for one of the monitoring programs listed below, see our website: www.nab-net.org to learn more about butterfly monitoring.


The Cascades Butterfly Project is a long-term citizen science project that monitors butterfly populations in the Northern Cascade Mountains of Washington. Monitoring is conducted in North Cascades National Park Complex, Mount Baker-...

The butterfly pavillion's mission is to foster an appreciation of invertebrates while educating the public about the importance of conservation of threatened habitats in the tropics and around the world.

The Florida Butterfly Monintoring Network seeks to promote and survey the health of butterfly populations throughout Florida. It brings together volunteers and scientists in a field-based conservation and education program targeting...

The Illinois Butterfly Monitoring Network engages citizen scientists in the process of collecting quantitative data on butterfly populations. Their goal is to provide data collected with a standardized protocol that allows land managers to...

The Iowa Butterfly Survey Network (IBSN) is located at Reiman Gardens with the ultimate goal of educating Iowans about butterflies, while at the same time encourage people to take an active role in conservation. To that end IBSN conducts...

The Michigan Butterfly Network seeks to assess the changing population status of our state’s butterfly species, evaluate the quality of Michigan ecosystems, and engage the Michigan public in significant citizen science research.

A new program that is based at the world-famous Missouri Botanical Gardens

Established in 2014 as part of our Pollinator Monitoring Program, the MPG Ranch Butterfly Monitoring Program tracks butterfly populations using modified Pollard Transects, timed surveys, inventory trips, and opportunistic sightings. Changes...

The Nevada Butterfly Monitoring Network is a citizen science program designed to record butterfly diversity and abundance over time throughout the state. The program brings together enthusiastic amateur naturalists with professional...

The New England Butterfly Monitoring Network is a new program that is being launched from the Museum of Science – Boston. The program is part of its outreach and education efforts and is linked to its Butterfly Garden.

The Ohio Lepidopterist Society has been monitoring butterflies throughout Ohio since 1995. The program is entirely volunteer-based, including its coordination and administration.

The Orange County Butterfly Monitoring Network in southern California engages citizen scientists and land managers in documenting changes in local butterfly populations and flowering plants serving as nectar sources over time. The Irvine...

TBMN is a citizen science program of Zoo Knoxville to monitor butterfly population trends on managed lands across Tennessee. We strive to connect butterfly enthusiasts with public lands, help land owners manage their properties for the...