Darwin's finches
Beak evolution exemplars
Darwin's finches are a group of small bird species native to the Galápagos Islands, famous for their role in Charles Darwin's development of evolutionary theory.
The birds display remarkable variation in beak shape and size, each adapted to different food sources—some crack seeds, others probe for insects.
Their diversity from a common ancestor became a textbook example of adaptive radiation and natural selection.
Differential reproductive success
- speciationFormation of distinct species
- common ancestorOrigin point of descendants
- divergenceSeparation from common origin
- variationChange from a norm
survival of the fittest · genetic drift · phylogeny · cladistics · mutation · selection pressure · fitness
Chain of scattered islands
- volcanic islandsLand formed by underwater eruptions
- research stationSite for scientific investigation
- IsabelaGalápagos archipelago's largest landmass
- Santa CruzCalifornia coastal university city
HMS Beagle · endemic species · giant tortoise · marine iguana · national park · marine reserve · conservation · Pacific Ocean
Research conducted on location
- breeding behaviorReproductive activity patterns
- nest buildingAssembling a shelter for young
- plumageBird's complete feather coat
- passerinePerching bird order member
songbird · avifauna · museum specimens · ornithologist · binoculars · observation · documentation
Taxonomic rank beneath species
- identificationEstablishing who someone is
- interbreedingMating between distinct populations
- hybridThing of mixed parentage
natural selection
Differential reproductive success
- speciationFormation of distinct species
- common ancestorOrigin point of descendants
- divergenceSeparation from common origin
variation · survival of the fittest · genetic drift · phylogeny · cladistics · mutation · selection pressure · fitness
archipelago
Chain of scattered islands
- volcanic islandsLand formed by underwater eruptions
- research stationSite for scientific investigation
- IsabelaGalápagos archipelago's largest landmass
HMS Beagle · Santa Cruz · endemic species · giant tortoise · marine iguana · national park · marine reserve · conservation · Pacific Ocean · equatorial
tool use
Manipulating objects purposefully
fieldwork
Research conducted on location
- breeding behaviorReproductive activity patterns
- nest buildingAssembling a shelter for young
- plumageBird's complete feather coat
passerine · songbird · avifauna · museum specimens · ornithologist · binoculars · observation · documentation
subspecies
Taxonomic rank beneath species
- identificationEstablishing who someone is
- interbreedingMating between distinct populations
- hybridThing of mixed parentage
Darwin's finchesliving fossils
Evolutionarily static organisms
horseshoe crabs · coelacanth · tuatara · nautilus · coelacanths