Honeybees in North America could in principle be a canary in the coal mine for pesticide problems or other issues, but they are a bad one precisely because they

Honeybees in North America could in principle be a canary in the coal mine for pesticide problems or other issues, but they are a bad one precisely because they are a monoculture; they are vulnerable to pathogens and toxins that natural species easily resist. Habitat loss and pesticides may be hurting native bees, but this is unrelated to honeybees. The issue is logically independent.