canary
Definition
a small, brightly colored songbird with a melodious voice; a warning signal or indicator of danger.
हिन्दी एक छोटा, रंगीन गीतकार पक्षी जिसकी मधुर आवाज है; खतरे का संकेत या सूचक।
Example
"They kept a canary in a cage because of its beautiful singing; miners once used canaries to detect gas leaks in tunnels."