A swarm of sand flies.[1]
They do kill by sucking them in the sand. people wouldn't breathe
Yes, Roundup can effectively kill sand burrs.
turn you into a mermaid or kill you
Sand flies can bite a person anywhere on the persons body. A person can use sprays to avoid being bitten by the flies.
Sand is not alive, so urine cannot kill it. However, some creatures like small crustaceans burrow under the sand. It would take a LOT of urine to kill one.
Blood
You kill the sand giants
Flies themselves don't kill people, but some flies may carry diseases that do.
They kill flies and other small insects to feed their larvae.
There are over 900 species of sand flies worldwide, with the most common genera being Phlebotomus and Lutzomyia. These flies are known for transmitting diseases such as leishmaniasis, a parasitic infection.
No