An Ecological Ambassador

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For 19 years, the owl researcher Denver Holt has journeyed to Barrow, Alaska, each summer to map out the relationship between the lemmings that crawl across the tundra and the white owls that hunt them from above.

Daniel J. Cox/Natural Exposures

An Ecological Ambassador

According to the owl researcher Denver Holt, snowy owls are a charismatic ambassador to the world to warn of problems caused by climate change.