They died, but medium ground finches with small beaks survived by eating small seeds. (sciencenews.org)
It makes more sense to classify the birds as a single species of ground finch with ecologically driven variations, Zink says. (discovermagazine.com)
Heavy - billed species like the large ground finch didn't sing the same range of frequencies or trill as fast as small - beaked species like the warbler finch. (sciencemag.org)