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Aptera in the 10th edition of Systema Naturae - Wikipedia
APTERA: The Wingless Wonders of the Insect World - Buglore
Birds or Class Aves – Description and Characteristics
Aptera - Encyclopedia
Bird - Aves, Species, Orders | Britannica
ADW: Aptera: CLASSIFICATION
ADW: Aves: CLASSIFICATION
Avian Physiology: Are Birds Simply Feathered Mammals?
Aves: Characteristics and Classification - The Science Notes
ADW: Aptera fusca: CLASSIFICATION