We encourage you to visit the websites of the following organizations to learn more about wildlife fertility control projects around the world.

Reference to any specific wildlife fertility control method, agent, product, process, or service, or the use of any trade, firm, NGO, or company name is for general information purposes only, and does not constitute endorsement, recommendation or favoring by the Botstiber Institute for Wildlife Fertility Control, the Dietrich W. Botstiber Foundation, or any featured individuals, agencies or organizations.

Humane Society International

Humane Society International (HSI) works around the globe to promote the human-animal bond, rescue and protect dogs and cats, improve farm animal welfare, protect wildlife, promote animal-free testing and research, respond to natural disasters and confront cruelty to animals in all of its forms.

The UK Squirrel Accord

The UK Squirrel Accord (UKSA) is a UK-wide partnership of 37 leading conservation and forestry organizations, government agencies and companies, with links to voluntary red squirrel conservation groups. UKSA works collaboratively to preserve the UK’s wooded landscapes and associated biodiversity under the following aims:  to secure and expand UK red squirrel populations beyond current thresholds; and to ensure UK woodlands flourish and deliver multiple benefits for future generations of wildlife and people.  In addition, UKSA is currently conducting research into a non lethal fertility control method to control grey squirrel population densities and support eradication efforts in the UK.


To advance understanding of wild animal welfare, Wild Animal Initiative conducts research and supports scientists with grants and professional services. Viewing wild systems through the lens of welfare raises new questions for researchers and wildlife managers: What are wild animals’ lives like? How can we measure their welfare? What can we do to improve their lives? Progress will require contributions from scientists across a wide range of disciplines, such as animal welfare science, ecology, animal behavior, cognitive science, physiology, and related areas.