Pteroptyx

The males of two species, P. malaccae and P. tener, are often found in large groups on certain trees and perform synchronized flashing displays to attract females for mating. The first report of these synchronous displays was recorded in Thailand over a century ago, although the number of fireflies have decreased, likely due to the reduction of the necessary mangrove forests due to urbanization and shrimp farming in Thailand. Pollution and habitat loss have resulted in the loss of nearly all Pteroptyx populations from the area around Bangkok.^[1]

Many of the species examined by Jusoh et al. in 2018 using genetic sequencing of the mitochondrial DNA were associated with mangroves, as their larva need a continuously damp environment to develop.^[8] As a result, many of the species in the genus are at risk of habitat loss due to damage of mangroves as a result of rising sea levels from climate change.

Boat tours for observing the congregating, synchronous flashing of Pteroptyx species are popular in the Sundaic region of southern Thailand and Malaysia. This form of ecotourism has been used to stress the importance of mangrove protection and preservation, as many of the tour operators are local fishermen earning supplemental income.^[9] The Kampung Kuantan Firefly Park in Selangor, Malaysia received over 57,000 visitors in 2018 to observe the synchronized flashing of P. tener; the fireflies have become an importance source of tourism dollars, although their numbers are decreasing due to human development and anthropogenic impacts on and near firefly habitats.^[10]

As described by Ballantyne & Lambkin in 2015, there are 17 known species in Pteroptyx.