What is this on this fly's bottom? : r/insects

Why insects are more sensitive than they seem

What Insects Go Through Is Even Weirder Than We Thought

What are these flies (?) and what are they doing? Seen in Toronto

What is this fly : r/insects

Different Types of Flies in North America

What are these flies (?) and what are they doing? Seen in Toronto

How to Identify Insect & Pest Droppings

Bot fly, Parasitic, Larvae, Pupae

When fish flies swarm: 5 things to know

All about flies - Welcome Wildlife

What are insects? - The Australian Museum

What Are Flies Attracted to, Get Rid of Flies