Four species of Orthemis are now known to form nocturnal roosting aggregations in Costa Rica, Panama, and Ecuador. A survey of 2 764 observational records from Costa Rica and Panama in iNaturalist revealed 9 communal roosts among 388 records of Orthemis but no such roosts in 2 376 records of 26 other libellulid genera. Additional unpublished photos add three more communal roosts in Orthemis.
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Vol. 9 • No. 7