Wan Faridah Akmal Jusoh

Artificial lights at night (ALAN) is a growing phenomenon that poses a significant threat to fireflies, which depend on natural darkness for bioluminescent communication. Yet, firefly populations persist near brightly lit urban areas, suggesting that certain environmental features may buffer the impact of ALAN. This study investigates how firefly populations respond to artificial lighting and whether canopy cover supports higher firefly occurrence in urban parks. We conducted field surveys at Bukit Kiara, an urban park in Kuala Lumpur, by recording firefly occurrences and measuring canopy cover, streetlight density and distance to the nearest streetlight. Using a negative binomial generalised mixed model (GLMM), we found that each additional streetlight was associated with a 36.7% reduction in expected firefly count, while a moderate positive correlation was observed between firefly occurrences and distance from streetlights. Conversely, the expected firefly count increased by 75.1% for every 18.7% increase in canopy cover. These findings suggest that canopy cover plays a key role in mediating the impact of artificial light on fireflies, potentially by providing localised shading that maintains low ambient light conditions. Urban park strategies that prioritise tree retention and connectivity of canopy cover may, therefore, support firefly persistence in light-polluted areas, though future research should account for species-specific responses and additional microhabitat and environmental variables.

Artificial lights expanding into natural environments disrupt ecological systems, affecting organisms that depend on natural light cues. Fireflies, which use bioluminescence for communication, are especially vulnerable. Although red light has been suggested as a solution, its effectiveness varies. This study examines how adult male and larval Lamprigera fireflies respond to varying intensities of artificial light at different wavelengths. We conducted field observations on adult male attraction patterns and ex situ studies of larval behaviour. Adult males were attracted to red and warm-white light, whereas larvae showed no response to red light or low-intensity light. Higher-intensity warm-white and cool-white light suppressed overall larval activity, with increasing intensity amplifying negative impacts regardless of spectral composition. Our findings indicate that successful light mitigation strategies for fireflies require balancing life stage-specific responses while maintaining artificial light intensities that minimise ecological impacts yet preserve human visual function.

Type specimens of flashing fireflies (Coleoptera, Lampyridae, Luciolinae) in the Naturalis Biodiversity Center, Leiden (RMNH) collection were documented. Specimens explicitly marked or indicated as types belonging to the lucioline fireflies were investigated with each specimen and its accompanying labels photographed, and its morphological characters analysed and compared with the original species description. The genitalia dissections of selected types enabled redescription and clarification of the taxonomic status of seven name-bearing type specimens. This study provides the first redescriptions of holotypes, designation of lectotypes for five species, and confirmation that two of these belong in the genus Luciola s. str. A lectotype and paralectotype were designated for two specimens of Luciola cerea Gorham, 1882 which is confirmed to belong to the genus Curtos Motschulsky, 1845. Atyphella testaceolineata Pic, 1939 was redescribed and figured based on the holotype (an incomplete specimen). We assigned Luciola laticollis Gorham, 1883 and Luciola nicollieri Bugnion, 1922 to Luciola sensu stricto and Luciola picea Gorham, 1882 to species inquirenda. The identity of Pteroptyx decolor Olivier, 1911 is finally confirmed as a close Indonesian relative of Pteroptyx valida Olivier,1909 and a lectotype is designated. In addition, we take the first opportunity to present pictures of the original holotype of Pygoluciola stylifer Wittmer, 1939. We also discuss the challenges taxonomists face in identifying specimens and how detailed dissections allow us to present descriptions of certain male features not previously addressed.

Fireflies are a diverse group of bioluminescent beetles belonging to the family Lampyridae. Recent research on their diversity, evolution, behavior and conservation has greatly advanced our scientific understanding of these charismatic insects. In this review, we first summarize new discoveries about their taxonomic and ecological diversity, then focus on recent endeavors to identify and protect threatened fireflies around the world. We outline the main threats linked to recent population declines (habitat loss and degradation, light pollution, pesticide overuse, climate change and tourism) and describe relevant risk factors that predict which species will be particularly vulnerable to these threats. Although global coordination of firefly conservation efforts has begun only recently, considerable progress has already been made. We describe work by the IUCN SSC Firefly Specialist Group to identify species currently facing elevated extinction risks and to devise conservation strategies to protect them. To date, IUCN Red List assessments have been completed for 150 firefly taxa, about 20% of which face heightened extinction risks. The conservation status for many species has yet to be determined due to insufficient information, although targeted surveys and community science projects have contributed valuable new data. Finally, we highlight some examples of successful firefly habitat protection and restoration efforts, and we use the framework of the IUCN SSC Species Conservation Cycle to point out high-priority actions for future firefly conservation efforts.

There is an urgent need for reliable data on the impacts of deforestation on tropical biodiversity. The city-state of Singapore has one of the most detailed biodiversity records in the tropics, dating back to the turn of the 19th century. In 1819, Singapore was almost entirely covered in primary forest, but this has since been largely cleared. We compiled more than 200 y of records for 10 major taxonomic groups in Singapore (>50,000 individual records; >3,000 species), and we estimated extinction rates using recently developed and novel statistical models that account for “dark extinctions,” i.e., extinctions of undiscovered species. The estimated overall extinction rate was 37% (95% CI [31 to 42%]). Extrapolating our Singapore observations to a future business-as-usual deforestation scenario for Southeast Asia suggests that 18% (95% CI [16 to 22%]) of species will be lost regionally by 2100. Our extinction estimates for Singapore and Southeast Asia are a factor of two lower than previous estimates that also attempted to account for dark extinctions. However, we caution that particular groups such as large mammals, forest-dependent birds, orchids, and butterflies are disproportionately vulnerable.

Most of arthropod biodiversity is unknown to science. Consequently, it has been unclear whether insect communities around the world are dominated by the same or different taxa. This question can be answered through standardized sampling of biodiversity followed by estimation of species diversity and community composition with DNA barcodes. Here this approach is applied to flying insects sampled by 39 Malaise traps placed in five biogeographic regions, eight countries and numerous habitats (>225,000 specimens belonging to >25,000 species in 458 families). We find that 20 insect families (10 belonging to Diptera) account for >50% of local species diversity regardless of clade age, continent, climatic region and habitat type. Consistent differences in family-level dominance explain two-thirds of variation in community composition despite massive levels of species turnover, with most species (>97%) in the top 20 families encountered at a single site only. Alarmingly, the same families that dominate insect diversity are ‘dark taxa’ in that they suffer from extreme taxonomic neglect, with little signs of increasing activities in recent years. Taxonomic neglect tends to increase with diversity and decrease with body size. Identifying and tackling the diversity of ‘dark taxa’ with scalable techniques emerge as urgent priorities in biodiversity science.

A new genus Nipponoluciola Ballantyne, Kawashima, Jusoh & Suzuki is proposed and described from males, females and larvae for two species of Japanese fireflies (Coleoptera, Lampyridae, Luciolinae) which have aquatic larvae. The famous Genji-botaru, the Genji firefly, formerly Luciola cruciata Motschulsky, 1854, now stands under Nipponoluciola cruciata (Motschulsky) gen. et. comb. nov. It is proposed that the original designation of this species from Java was in error and that the species is only known from Japan. The lesser known Kumejima-botaru, formerly Luciola owadai Satô & Kimura, 1994, now stands under Nipponoluciola owadai (Satô & Kimura) gen. et comb. nov. A neotype for Luciola cruciata is designated. Keys to adult males and larvae of Luciolinae genera with aquatic larvae are given. An overview of the status of the genus Luciola s. str. is given. Supplementary file addresses 1. Mitogenome analyses of the Luciolinae; 2. List of species of Luciola s. str.; 3. List of Japanese Luciolinae; 4. The identity of Luciola lateralis Motschulsky.

Most of arthropod biodiversity is unknown to science. For this reason, it has been unclear whether insect communities around the world are dominated by the same or different taxa. This question can be answered through standardized sampling of biodiversity followed by estimation of species diversity and community composition with DNA sequences. This approach is here applied to flying insects sampled by 39 Malaise traps placed in five biogeographic regions, eight countries, and numerous habitats (>220,000 specimens belonging to >25,000 species in 463 families). Unexpectedly, we find that 20 insect families account for >50% of local species diversity regardless of continent, climatic region, and habitat type. These consistent differences in family-level dominance explain two-thirds of variation in community composition despite massive levels of species turnover, with most species (>97%) in the top 20 families encountered at a single site only. Alarmingly, the same families that dominate global insect diversity also suffer from extreme taxonomic neglect with little signs of increasing activities in recent years. Tackling the biodiversity of these “dark taxa” thereby emerges as an urgent priority because the arthropod groups comprising most of the global flying insect diversity are particularly poorly known.