Rat poison is usually an anticoagulant that is it is a chemical that stops blood from coagulating. So yes it should finish off (kill) an iguana if it eats enough of it.
arsenic
bromide
Chico the iguana and Manuel the rat :)
no
To kill the pigeons with rat poison, you will have to poison their food with the rat poison. You can poison the water that the pigeons drink and the cereals that the pigeons eat.
Black rat poison.
Several. Arsenic was once used as a rat poison and also has use in medicine (bone marrow disorders as an example. Thallium was once used as a rat poison and was once used to treat Syphillis Barium used to be used in rat poison and is used in medicine (barium meal) for some types of scan. Mostly these days however it is a compound that applies to both rather than an element - that being Warfarin.
There is no rat poison in toothpaste. Never.
Barium is used for rat poison.
Yes it is poisonous to humans if you eat it or drink it.
No, it could not, because the poison was specifically designed to kill rats, and was developed as a rat poison/killer, not a human poison/killer. It would still be considered rat poison, even if the human died from the rat poison.
Oleander