The argasid tick Hyalomma marginatum was found in pale crag martin nests on a sarcophagus and an ancient tomb in Egypt. This tick has been implicated in the transmission of Bahig virus, a pathogenic arbovirus previously thought to be transmitted only by mosquitoes. Another argasid tick, Argas africolumbae, was found in a nest of the closely related rock martins in Kenya. The nasal mite Ptilonyssus echinatus was found in a pale crag martin in the Tibesti Mountains of northern Chad.