WHERE ARE ALL THE DEAD BIRDS?

"Birds of all sizes and species can become prey, and while cats, dogs, and other mammals such as foxes and raccoons are common bird predators, many unusual and unexpected predators also target birds - Aug 8, 2019"

from "Strange Predators That Eat Birds - The Spruce"

www.thespruce.com/strange-bird-predators-386775

That you didn't think of this probably means you're a very nice person.

Also, dying birds probably go to fresh water sources, like streams, creeks, rivers, so yeah, their journeys probably often end there, or your front doorstep if you have a cat who's a great mouser with no mice to kill (that happened when I was 3).