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They don't do this any more as there are electronic detectors now. Birds or any small creature will be affected by carbon monoxide just as humans. The birds were used because they sang. When they could not be heard, the miners checked them. If they were dead, the miners got out of the mine as fast as possible.
What else can I help you with?
What is the the most poisonous bird in America?
Birds are not poisonous.
Where are poisonous birds located?
Poisonous birds do not exist according to science so you can not find them anywhere in the world.
Why are voles poisonous and are they poisonous to animals?
Voles are not "poisonous," and are eaten by birds of prey worldwide.
What kind of birds did miners take underground with them?
Miners often took canaries underground with them. Canaries were used as an early warning system for dangerous gases such as carbon monoxide in the mines. If the bird stopped singing or died, it was a sign for the miners to evacuate the mine immediately.
Is duck fat poisonous to wild birds?
No , ducks fat is not poisonous .
Why do most birds avoid monarch butterflies?
they are poisonous. As beautiful as they are. It is in fact true that Monarch's are extremely poisonous.
Can birds eat choclote?
NO. Just like cats, dogs, and horses, chocolate is poisonous to birds.
How do birds detect the presence of a hawk in their vicinity?
Birds detect the presence of a hawk through their keen eyesight and acute hearing. They also rely on alarm calls from other birds to alert them of potential danger.
What eat's centipedes?
Birds will eat non poisonous centipedes.
What do lady bugs look like if they are poisonous?
So birds and other predators don't eat them! The aren't poisonous, though.
Why can birds eat poisonous berries and humans can't?
Because of corned bop
What behavior does the viceroy use to deter birds that would otherwise eat it?
Viceroy butterflies are not poisonous, but they look just like poisonous monarch butterflies. Which behavior does the viceroy use to deter birds that would otherwise eat it
