Hawaiian honeycreepers comprise a number of bird species that are found only on the hawaiian islands. the images show examples of two distinct honeycreeper species. each honeycreeper species exhibits phenotypic differences in characteristics, such as beak shape and plumage color. all of the hawaiian honeycreeper species are believed to have evolved from a common ancestor as the birds began to occupy different ecological niches on the hawaiian islands. what evolutionary concept best describes what we observe with the hawaiian honeycreepers?