Exploring species in Bulgaria
Abbotswood Cinquefoil 
Acanthostachys strobilacea 
Acer tataricum 
Acmaeoderella flavofasciata 
Actinotia radiosa 
Addax 
Adonis vernalis 
Adscita obscura 
Aegilops geniculata 
Aeonium decorum 
Aeonium simsii 
Aeonium tabuliforme 
Aesculapian snake 
Aethionema 
African violet 
Agelena labyrinthica 
Agile frog 
Alabonia staintoniella 
Alkanna stribrnyi 
Alocasia macrorrhizos 
Alpine squill 
Alternate-leaved golden-saxifrage 
Althaea cannabina 
American cockroach