Yes, rotting organic matter is a source of food for the larval form of the fly.
TT
Did you see her lay the egg or did you find the egg in the parking lot? If you saw her lay the egg in the lot I would say that while trying to lay the egg it became stuck and she walked until it worked it's way out. If you found it in the lot, chances are a local nest was raided the predator dropped the egg before he could get away with it.
yes
A roster is a list of names and would not lay an egg. A rooster is a male domestic fowl and would, likewise, not lay an egg. A rooster is a male and wouldn't lay an egg. But if you mean hens, they could roll down hill depending on the wind.
no egg can lay another egg because they have not been born yet when the egg has hatched and it has grew up then they can lay an egg of there own.
If they hide there, they lay the egg there too.
lay egg
It will lay an egg eventually if you put the opposite gender /male a female might lay an egg.
Because tolawangi looked at it!
lay an egg. check
They would lay an egg and wait for it to hatch.