Brachydeutera shore flies, ecologically and taxonomically significant as versatile detritivores in shallow aquatic habitats and as a key evolutionary lineage used to reconstruct the phylogeny of the family Ephydridae, swarm noisily over foul-smelling water and land on its surface in an artificially created jute-retting pit within a rice cultivation field. Larvae act as opportunistic feeders in stagnant freshwater, ephemeral pools, and constructed wetlands, scraping and filter-feeding on microscopic algae, bacteria, and decaying plant matter to help break down organic detritus in shallow lentic ecosystems. They rapidly colonize temporary or disturbed aquatic environments and serve as indicators of organic enrichment or micro-habitat shifts. The pit exists due to a weak monsoon caused by El Niño.
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