Blowfly
/ˈbləʊflaɪ/
Definition 1 of 2
Pro Tip 1/3Negative Connotation
Blowfly often implies decay or poor hygiene, evoking disgust or unpleasant feelings. 
The stench and blowflies swarming the alleyway made it clear the trash hadn't been collected in weeks.
Pro Tip 2/3Specific Habitats
Blowflies are commonly found near decomposing matter and rarely in clean environments. 
As the blowflies swarmed the discarded fish, it was evident the market needed better sanitation.
Pro Tip 3/3Visual Identification
The term 'blowfly' helps visualize scenes with metallic blue or green colored flies. 
A large blowfly, its iridescent wings catching the light, landed on the windowsill.