Project Collaborators

DC Cat Count

PetSmart Charities®

PetSmart Charities, Inc. is a nonprofit animal welfare organization with a mission to find lifelong, loving homes for all pets by supporting programs and thought leadership that bring people and pets together. In addition to finding homes for almost 500,000 shelter pets each year through its in-store adoption program in all PetSmart stores across the U.S. and Puerto Rico, PetSmart Charities provides funding to non-profits aligned with its mission through four key areas of grant support: Preventing Pet Homelessness; Helping Shelter Pets Thrive; Supporting the Bond Between People and Pets; and Emergency Relief and Disaster Support. Each year, millions of generous PetSmart shoppers help pets in need by donating to PetSmart Charities using the pin pads at checkout registers inside PetSmart stores. In turn, PetSmart Charities efficiently uses 90 cents of every dollar donated and has become the leading funder of animal welfare in North America, donating about $300 million to date. PetSmart Charities, a 501(c)(3) organization, has received the Four Star Rating from Charity Navigator, an independent organization that reports on the effectiveness, accountability and transparency of nonprofits, for the past 15 years in a row – placing it among the top one percent of charities rated by this organization. To learn more visit

The Humane Society of the United States

The Humane Society of the United States is the nation's most effective animal protection organization. We and our affiliates provide hands-on care and services to more than 100,000 animals each year, and we professionalize the field through education and training for local organizations. We are the leading animal advocacy organization, seeking a humane world for people and animals alike. We are driving transformational change in the U.S. and around the world by combating large-scale cruelties such as puppy mills, animal fighting, factory farming, seal slaughter, horse cruelty, captive hunts and the wildlife trade.


Humane Rescue Alliance

The Humane Rescue Alliance was established by the historic merger of two iconic animal welfare organizations: the Washington Humane Society (WHS) and the Washington Animal Rescue League (WARL). Building on the success of more than a century of each organization protecting, rescuing, and caring for animals in the District of Columbia, the Humane Rescue Alliance now provides area residents with a single destination for animal-related needs—whether it is a search for a new companion to join their family, financial assistance with veterinary care or pet food, assistance with behavioral problems, vaccination or spay/neuter services, or help from officers for a lost, injured, or abused animal.


The American Society for the Prevention of Cruelty to Animals

The American Society for the Prevention of Cruelty to Animals® (ASPCA) is the first humane society established in North America and was founded on the belief that animals are entitled to kind and respectful treatment and must be protected under the law. For over 150 years, we have worked to put an end to animal abuse and neglect. We are a national leader in animal rescue, protection and placement—with programs that advance our anti-cruelty mission across the country. The ASPCA rescues and rehabilitates animal victims of cruelty and neglect, finding homes for animals in need. We investigate cruelty cases and support law enforcement to help bring animal abusers to justice. We create and help to pass lifesaving legislation to protect animals from abuse and exploitation. The ASPCA also provides grants and training to local animal welfare groups so they can save more lives in their communities. Together, our programs impact hundreds of thousands of animals each year and make society a more compassionate place for animals.

Smithsonian Institution

The Smithsonian Conservation Biology Institute (SCBI) plays a leading role in the Smithsonian’s global efforts to save wildlife species from extinction and train future generations of conservationists. SCBI spearheads research programs at its headquarters in Front Royal, Virginia, the Smithsonian’s National Zoo in Washington, D.C., and at field research stations and training sites worldwide. SCBI scientists tackle some of today’s most complex conservation challenges by applying and sharing what they learn about animal behavior and reproduction, ecology, genetics, migration and conservation sustainability.

Individual Collaborators


John Boone

John D. Boone, Ph.D., is the Research Director at the Great Basin Bird Observatory in Reno NV, where he and his colleagues conduct applied research, monitoring, and planning to support bird conservation. He is also a Scientific Consultant to the Humane Society of the United States and Humane Society International. In this capacity, Dr. Boone has contributed to dozens of projects around the world that seek to better and more humanely manage free-roaming dog and outdoor cat populations. In addition, he is currently Board Chair of the SPCA of Northern Nevada and Vice-Chair of the Alliance for Contraception in Cats & Dogs.

Tyler Flockhart

Dr. Tyler Flockhart is a population ecologist and conservation biologist. His research seeks to understand the factors that influence changes in animal populations and applying decision-theory to design optimal management strategies for species of concern in the face of global change. His research on cats has focused on understanding the behavior of feral cats, the abundance and distribution of both free-roaming cats and birds in cities, and developing techniques to measure the true impacts of cats on birds. He is working on developing evidence-based population models for cats and birds to make optimal decisions to both improve cat welfare and minimize risk to birds at the lowest possible cost.

Ashley Gramza

Ashley Gramza is a conservation social scientist who studies why and how people make decisions that influence wildlife and nature. More broadly, Ashley is interested in the social aspects of conservation and helping people collaborate on complex but important issues such as urban wildlife and outdoor cats. Ashley has a unique blend of experience in both wildlife ecology and social science. As part of her graduate research, she studied the thoughts and motivations of cat owners surrounding their decisions of whether or not to let their cats spend time outdoors unrestricted.

Julia Kilgour

Julia Kilgour is a behavioral ecologist whose research interests include social dynamics in animal populations and how the local environment shapes animal interactions, particularly in competitive scenarios. She is also interested in urban ecology, particularly in reducing human-animal conflict, and how urban centers can better support animal populations. Through the Lincoln Park Zoo, where she is an adjunct researcher, Julia’s research with cats has examined the efficacy of trap-neuter-return programs on cat populations in highly urban areas of New York City.