Presentation of Bird, canary in cage as being used in coal mines for gas detection. Coal Mine museum, Oranje Nassau, Heerlen, Limburg, Netherlands.

---

Size: 4000px × 2667px
Location: Heerlen, Netherlands
Photo credit: © Perry van Munster / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: bird, cage, canaries, canary, closed, coal, dangers, deep, detection, detention, discover, energy, fossil, fossiles, fuel, gas, heerlen, industry, limburg, mines, mining, munster, museum, nassau, nervous, netherlands, oranje, perry, pit, pits, system, underground, van