Examine the figure below that shows when different species of migratory hummingbirds arrived at spring breeding grounds.
Which of the following statements reflects changes over approximately the past 130 years in hummingbirds and their utilization of the spring breeding grounds?
A) Hummingbirds are arriving at spring breeding grounds earlier in the past 20 years or so than 100 years ago.
B) Hummingbirds have expanded their spring breeding grounds in the south, areas depicted in orange on the map.
C) Hummingbirds are no longer breeding in the easternmost region on the map, area in dark blue.
D) In the past 20 years, hummingbirds are arriving at spring breeding grounds later than they were 100 years ago.
Correct Answer:
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