There are a number of opportunities for volunteering in Bulgaria. Various international organisations have ongoing projects in the country, and there are also many local groups that welcome foreign volunteers.
British Society for the Protection of Birds (www.rspb.org.uk) Occasional opportunities to assist with fieldwork relating to endangered species.
Bulgarian Archaeological Association (www.archaeology.archbg.net) Find out about volunteering opportunities on archaeological digs in Bulgaria.
Green Balkans (www.greenbalkans-wrbc.org) Rescue centre for the rehabilitation of injured animals, with a network of volunteers who transport creatures back to their habitats.
Habitat for Humanity (www.habitatbulgaria.org) Organises house-building and community-based projects in poorer neighbourhoods.
World Wide Opportunities on Organic Farms (www.wwoofbulgaria.org) Can direct you to current projects and openings for volunteers on farms around the country.