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5,133 species in Big Bend National Park
Dorymyrmex flavus
Drassyllus aprilinus
Drasteria fumosa
Drepanulatrix bifilata
Drymaria pachyphylla
Dryobates pubescens
Dyschoriste decumbens
Dyscrasis hendeli
Dysphania incisa
Egretta rufescens
Enallagma praevarum
Epicauta gissleri
Epicauta tenella
Eremobates norrisi
Eremobates texanus
Eremothera chamaenerioides
Erioneuron pilosum
Ersephila indistincta
Erythrodiplax connata
Erythrostemon gilliesii
Escobaria vivipara
Eulithosia composita
Eunica monima
Euphorbia dentata
Euphorbia exstipulata
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