Links to biodiversity data
Lithuania
Terrestrial invertebrates (supported by Lithuanian Entomological Society)
Birds (supported by Lithuanian Ornithological Society)
Lithuanian invasive species database (maintained by Klaipeda university)
International
Discover Life - popular database
ERMS - European Register of Marine Species
Fauna Europaea - fauna of Europe: taxonomy, distribution, etc.
ITIS - Integrated Taxonomic Information System
Tree of Life - phylogenetical database
World Species List - meta-database
Vertebrates
MSW - Mammal Species of the World
Avibase - a global bird database
Amphibian Species of the World
FishBase - a global fish database
Invertebrates
Plant Bugs of the World (Hemiptera: Miridae)
HOLD - Hymenoptera On-Line Database
Plants
IPNI - the International Plant Name Index
Plant databases and other sources - Royal Botanic Gardens, Kew
Important national databases
FaunaItalia - checklist of the Italian fauna, etc.
LIFE - Finnish biodiversity index