The poor canary one of the so called sentinel species are no longer used to alert the miners to the presence of carbon monoxide
It appears that our feathered friend breathing rate its size and metabolism caused it to die quickly if carbon monoxide was present thus giving the miners an early warning of the hazard
This is good news for canaries
A Red Factor Canary
I own a red factor canary
I keep it in a cage
That overlooks a railway line
It knows nothing about coal mining
Vacation
I offered to take my canary
On vacation to the Canary Islands
The creature refused to go
As it wanted to visit a coal mine
And pray for the souls of its ancestors