The Big Bird and his descendants are a rare glimpse at how a natural hybridization event can form a new lineage from two species that live in the same area. However, there is not yet scientific consensus about whether the Big Bird lineage should be considered its own species. There is evidence for and against its classification as a separate species. Using the biological species concept as your guide, sort the following observations based on whether they support the notion that the Big Bird lineage is a separate species or whether they refute the notion that it is a separate species.