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B.C. researchers are asking the public to send in feces (phân) from hummingbirds (chim ruồi) to determine their health which they say could help measure one of the indicators of a healthy planet.

They're also asking those who are able to send in any hummingbird feces they collect.

"It sounds like a strange thing, but we have sparked this investigation of hummingbirds because they are such great pollinators (thụ phấn)," said Lisa Wood, an associate professor and researcher at the University of Northern British Columbia.

Wood says they are looking into the interactions of pollinators and plants that have been sprayed with glyphosate-based herbicides (thuốc diệt cỏ) in forests.

These are some of the most widely used herbicides in the world and in B.C., they are used to encourage the growth of coniferous (có quả nón, loại tùng bách) trees, often at the expense of other plants.

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