Amegilla zonata 
Ameiva atrigularis 
Amelanchier canadensis 
Ameles decolor 
Ameles heldreichi 
Ameletus ludens 
Amenia chrysame 
American Abrupt-Bulbed Lepidella 
American Alligator 
American alpine speedwell 
American alumroot 
American angle shades 
American Anzia Lichen 
American avocet 
American Badger 
American Barn Owl 
American Basketflower 
American basswood 
American Beautyberry 
American beech 
American bellflower 
American Bison 
American bittern 
American Bittersweet