Welcome to PollardBase

PollardBase 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, visit The North American Butterfly Monitoring Network website 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-Snoqualmie National...

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 butterflies.

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 evaluate...

The Illinois Odonate Survey is a citizen science program of the Chicago Academy of Sciences/Peggy Notebaert Nature Museum that seeks to gain a greater knowledge of the distribution and abundance of Illinois dragonflies and damselflies.

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 research...

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 in...

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 scientists to help...

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 Occoquan Regional Monitoring Project is focused on monitoring protected lands at several sites south of Washington DC. Butterflies are surveyed as part of two survey protocols: year-round general biodiversity surveys and butterfly/dragonfly...

The Occoquan Regional Monitoring Project is focused on monitoring protected lands at several sites south of Washington DC. Dragonflies are surveyed as part of butterfly/dragonfly surveys that take place April through October. Survey routes are...

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 Ranch...

The Partnership of Regional Institutions for Sage Scrub Monitoring (PRISSM) (www.prissm.org) is a multi-institutional effort to establish long-term bio-monitoring programs in California sage scrub (CSS) fragments...

Since 2006 the rare Charitable Research Reserve has monitored butterflies on four transects across our 900+ acre property located in Waterloo Region, Ontario, Canada. This program is one part of an ecological monitoring program that monitors a suite...

The Rocky Mountain Butterfly Project started in 1995 when lead investigator Rich Bray first established transects across Rocky Mountain National Park. From 1997-2011, volunteer citizen scientists systematically surveyed the butterfly species that...

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 benefit of...

The Texas Butterfly Monitoring Network is a citizen science program that monitors butterfly populations around the Lone Star State. This program seeks to better inform efforts for butterfly conservation and habitat preservation, and at the same time...