BeC – Bern Convention
BoC – Bonn Convention
BD – Bird Directive
HD – ÅC Habitats Directive: Council Directive on the conservation of natural habitats of wild fauna and flora (92/43 EEC)
ÅCS – European Conservation Status
RDB – Red Data Book
BDA – Biodiversity Act
IUCN – International Union for Conservation of Nature and Natural Resources
CITES – Convention on International Trade in Endangered Species of Wild Fauna and Flora
EX – extinct
CR – critically endangered
EN – endangered
VU – vulnerable
IZ – Institute of zoology, Bulgarian Academy of Sciences
NMNH – National Museum of National History, Bulgarian Academy of Sciences
MOEW – Ministry of Environment and Water of Bulgaria
MAF – Ministry of Agriculture and Forests of Bulgaria
BSPB – Bulgarian Society for the Protection of Birds
SPEC – Species of European Conservation Concern
NeP – Nature Park
NP – National Park
PA – Protected Area
PT – Protected Territory