Snails and slugs are more sensitive to the effects of iron phosphate than other organisms. Iron phosphate is practically non-toxic to mammals, birds and fish.

Is ferric phosphate safe for birds?

Organic slug pellets contain Ferric Phosphate or Iron III phosphate as an active ingredient. ... If the pellets (or the slugs which have eaten them) are eaten by birds, mammals etc, they will suffer no adverse effects. However, use sparingly.

Is ferric phosphate safe for wildlife?

Organic slug killers use Ferric or Iron Phosphate as their active ingredient. This on its own is fairly safe, as it is a pretty insoluble substance and not easily absorbed by animals.