- Birdwatching Bulgaria
- Specializes in different outdoor activities including bird watching, trekking and horse riding. Also provides list of species recorded and details for birding areas.
- Neophron Ltd.
- Company that proffers variety of bird watching and other wildlife excursions in Bulgaria. Also includes destinations, accommodation and transport information.
- Via Pontica Tours
- Proffers bird watching excursion during spring and autumn in mountain areas. Also includes information on geographic situation, climate, relief, history and biodiversity.
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