Why Do Hummingbirds Emigrate from This Population of Scarlet Gilia

question 39

Multiple Choice

Why do hummingbirds emigrate from this population of scarlet gilia?

• A)The flowers probably change their nectar production.
• B)The flowers change from red to white,and the hummingbirds can't see them.
• C)It gets darker on the mountainside,and the hummingbirds migrate to lower elevations where it stays light longer.
• D)There is not enough information presented to answer this question.

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