The Tapajos scale-backed antbird and the common scale-backed antbird live along the Tapajos river in the Amazon. The symbols on the map and phylogeny represent individuals. Stars are hybrids. Consider whether, under the three species concepts we have discussed in class, the birds represent one species or two. a) Concept one:
ONE species / TWO species. Explain in 1 or 2 sentences

b) Concept two:
ONE species / TWO species. Explain in 1 or 2 sentences:

c) Concept three:
ONE species / TWO species. Explain in 1 or 2 sentences:

d) What might be causing genetic isolation between the Tapajos vs. Common scale-backed antbirds? Explain in 2 or 3 sentences.

e) What might be causing genetic divergence between the Tapajos vs. Common scale-backed antbirds? Explain in 2 or 3 sentences.

f) Why is the combination of isolation and genetic divergence important? Explain in 2 or 3 sentences.