Until recently, the myrtle warbler and the audbons warbler were thought to be separate species of birds because the males have very different appearences. which of the following observations most likely led to the reclassification of these warblers as one species?

Question

the myrtle warbler and the audubons warbler have the same diet.

the myrtle warbler and the audubons warbler lay the same number of eggs

the myrtle warbler and the audubons warbler have overlapping geographical ranges.

the myrtle warbler and the audubons warbler interbreed and produce fertile offspring.

Answer 1

The observation that most likely led to the reclassification of the myrtle warbler and the Audubon's warbler as one species is:

the myrtle warbler and the audubons warbler interbreed and produce fertile offspring.

This observation is crucial in biological classification, as the ability to interbreed and produce fertile offspring is a key criterion for defining a species. If two populations can successfully mate and their offspring are viable and fertile, it indicates that they are not separate species but rather variations within the same species.