''Echo'' is a genus of

damselflies Damselflies are flying insects of the suborder Zygoptera in the order Odonata. They are similar to dragonflies, which constitute the other odonatan suborder, Anisoptera, but are smaller and have slimmer bodies. Most species fold the wings along ...

belonging to the family Calopterygidae. There are five species.Zhang, H. M., Hämäläinen, M., & Cai, Q. H. (2015)
Description of ''Echo candens'' sp. nov. from western Yunnan, China (Odonata: Calopterygidae).
''Odonatologica'' 44(1-2), 107-116. A sixth, ''Echo maxima'', is sometimes included, but it probably belongs to a different genus.Yu, X. and Hämäläinen, M. (2012)
A description of ''Echo perornata'' spec. nov. from Xizang (Tibet), China (Odonata: Calopterygidae).
''Zootaxa'' 3218 40-46. This genus is distributed in Asia, especially Southeast Asia. Species include: *''

Echo candens ''Echo candens'' is a species of broad-winged damselfly in the family Calopterygidae. References Further reading * Calopterygidae Articles created by Qbugbot Insects described in 2015 {{Calopterygoidea-stub ...

'' Zhang, Hämäläinen, & Cai, 2015 *''

Echo margarita ''Echo margarita'' is a species of broad-winged damselfly in the family Calopterygidae. The IUCN conservation status of ''Echo margarita'' is "LC", least concern, with no immediate threat to the species' survival. The IUCN status was reviewed i ...

'' Selys, 1853 *''

Echo modesta ''Echo modesta'' is a species of broad-winged damselfly in the family Calopterygidae. The IUCN conservation status of ''Echo modesta'' is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN ...

'' Laidlaw, 1902 *''

Echo perornata ''Echo perornata'' is a species of broad-winged damselfly in the family Calopterygidae. References Further reading * Calopterygidae Articles created by Qbugbot Insects described in 2012 {{Calopterygoidea-stub ...

'' Yu & Hämäläinen, 2012 *''

Echo uniformis In audio signal processing and acoustics, an echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the li ...

'' Selys, 1879Dow, R. A. 2009
''Echo uniformis''.
The IUCN Red List of Threatened Species. Downloaded on 23 January 2016.

References

Calopterygidae Zygoptera genera Taxa named by Edmond de Sélys Longchamps {{Calopterygoidea-stub