Research interests
Systematics, biology and chorology of the Bulgarian lizards families (Lacertidae, Scincidae, Anguidae, Gekkonidae) in particular and the rest of the herpetofauna; the origin and formation of the recent Bulgarian and Balkan herpetofauna; intraspecific and interspecific hybridisation among the close related members of family Lacertidae; morphological differentiation correlated to the environmental conditions in amphibians and reptiles.
Current projects
Morphological characteristics of the Bulgarian lacertid lizards (Lacertidae)
Bulgarian Red Data Book. Species Snake-eyed lizard Ophisops elegans and European glass lizard Pseudopus apodus
Research on the herpetofauna in the pure studied regions in Bulgaria
Selected publications
Tzankov N. 2004. Studying on the subspecies affinity of five population of Ablepharus kitaibelii (Bybron & Bory, 1833) in Bulgaria. — Annuaire de l’Université de Sofia ‘St. Kliment Ohridski’ 2004, 96, livre 4, pp. xx, 10 session scientifique, Sofia ’03.
Tzankov N. 2004. Sympatric distribution of six lacertid lizards. — Annuaire de l’Université de Sofia ‘St. Kliment Ohridski’ 2004, 96, livre 4, pp. xx, 10 session scientifique, Sofia ’03.