South America and the Galapagos Islands

South American and Galapagos FinchesPedigree

Common Ancestor

South American Finch

Medium Ground Finch:Crushing beak eats eggs from giant tortoises and land iguanas, also eats seeds and insects.

Small Ground Finch: eats softer seeds and insects

Large Ground finch:Eats harder seeds, insects, and eggs.

Large Ground or Cactus Finch:Uses longer beak to reach past thorns and into flowers of eat cactus plants

Wolf or Vampire Ground Finch: Due to limited food sources this finch uses its’

sharp beak to peck at birds until they bleed and eat the blood for food!

Isabella Island: Dry with scrub and cactus

Wolf Island: lots of birds!

Santa Cruz Island: Varied plant and animal life.

San Cristobal Island:

Geographic Isolation