Why were canaries used down the mine?

[@AfterTheRains]

Love to see your occasional videos pop up.

[@Slimeme73]

Great video. I saw some Canaries in Abbey Gardens Bury St Edmunds and thought of Beamish the other day

[@moiragoldsmith7052]

Jeezzz 100 years of using canaries until a more 'sophisticated ' man made meter was used. Bless those little yellow feathered friends. 💛💛💛

[@parkerdix]

Love beamish