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The figure below shows the proportion of individuals attacked by birds in a population of butterflies in central Panama.
The figure below shows the proportion of individuals attacked by birds in a population
of butterflies in central Panama. The red bar represents
Heliconius melpomene
(labeled
ME), the white bar represents
Heliconius cydno
(labeled CY), and the gray bar represents
F1 hybrids between the two. Do the data in the figure indicate a reproductive barrier
between these two species? If so, what kind of barrier is suggested?