Background Bat influenza viruses (BIVs, H17N10 and H18N11) were discovered in 2012; while there has been extensive work on the cellular and molecular biology, little is known about its dynamics of circulation in wild bats. Methods Here, we used longitudinal serology data collected from common vampire bats (*Desmodus rotundus*) from twelve clusters in Peru between 2009 and 2018 to understand the effects of demographic, environmental and spatiotemporal drivers on the seroprevalence of H18. ELISA assay was used to determine the exposure of H18. Binomial generalised additive mixed models were used to evaluate the variables that explain seroprevalence. Results Our models showed that seroprevalence was mainly associated with spatiotemporal factors - each cluster had independent transmission cycles. Seroprevalence peaked at the transitions between the wet and dry seasons. Environmental effects such as elevation, bat species richness and livestock density were negatively correlated with seroprevalence, and demographic drivers were independent of seroprevalence. Conclusion These results indicated that vampire bats sustained H18 without the involvement of other bat species and that the H18 was endemic to the sampled populations. Our models were able to identify patterns in exposure suggestive of endemic circulation, which implies high exposure risk in non-bat species due to vampire bat ecology, but the zoonotic risk is unknown.