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 Cascade-Siskiyou Butterfly Monitoring Network is a newly established long-term monitoring program that monitors butterfly populations in the Cascade-Siskiyou bioregion of southwest Oregon and Northern California. The program brings together researchers, land managers, and community scientists to collect data that will inform local conservation efforts and help program managers evaluate...

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 Forest, Mount Rainier National Park, and Okanogan-Wenatchee National Forest.

Butterfly Pavilion exists to foster an appreciation of invertebrates by educating the public about the need to protect and care for threatened habitats globally, while conducting research for solutions in invertebrate conservation.

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 long-term trends in a changing landscape. The Network also offers opportunities for fellowship, mentorship, and continuing education between...

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 using volunteer citizen scientists of all skill levels to collect data for yearly population surveys of butterfly species in the state of Iowa....

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 relative abundance of butterfly populations are analyzed in terms of habitat restoration efforts, land management practices, weather events, and...

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 understand changes in butterfly populations over time.

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. Both butterflies and dragonflies are surveyed as part of butterfly/dragonfly surveys that take place April through October. Butterflies are also surveyed as part of year-round general biodiversity surveys. Survey routes are located in the Occoquan Bay National Wildlife...

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 Conservancy initiated the program in 2011 in Limestone Canyon Wilderness Preserve.

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 throughout southern California. PRISSM’s goals are to (1) enhance collaboration among researchers and land managers of natural area/reserve/...

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 of terrestrial and freshwater indicator species to best assess the health and ecological integrity of the land owned and stewarded by rare.

Butterfly surveys at Rice Creek Field Station were initiated in 1996 by Peter G. Weber, then a professor in the Department of Biology at SUNY Oswego. Pete was assisted by his son, Nicholas F. Weber, and by Michael Holy, science teacher at Hannibal High School and an alumnus of SUNY Oswego. Mike has continued this monitoring effort since Peter's retirement and move to Colorado in 2009.


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 occur in the park. Surveys were conducted from May 1 to September 17, a 20 week season.

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 pollinators and inspire the public to enjoy and protect butterflies and other pollinators.

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 engages the public in taking an active role in butterfly conservation.

Established by the Milwaukee Public Museum and the Milwaukee Harbor District in 2018, the Wisconsin Butterfly Monitoring Network is a cooperation among many additional partners that survey our state's butterfly diversity as a way to help assess ecological change over time and engage the public as citizen scientists.