Examining Potential
Causes of Population Declines in Rufous Hummingbirds
Rufous Hummingbird populations are experiencing a large
decrease (> = 50%)
in Canada. The core of the global range of this species is in British Columbia.
This is the only hummingbird species which is showing declines among the
species that occur in Canada. There
may be multiple factors underlying those declines and stressors may act at
different life stages and locales throughout the year as hummingbirds migrate,
breed and overwinter. As a pollinator, the rufous hummingbird
contributes significant ecosystem services. To test the hypothesis that
hummingbirds may be exposed to
insecticides, this research will determine rufous hummingbird exposure
to pesticides and their possible effects in the Fraser Valley.
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