Skip to content
WAnimals
  • Map
  • Species
  • Parks
  • Diving
Log inCreate account
WAnimals

The guide for travellers and animal lovers: discover, plan and share your wild adventures around the world.

Discover wildlife

  • Species
  • Ecosystems
  • Glossary
  • Tags

Explore places

  • Map
  • Countries
  • Parks
  • Diving

Plan experiences

  • Guides

Learn

  • Blog

Resources

  • About us
  • How we build our profiles
  • Help centre
  • Contact
  • Install the app

Follow us

Account

  • Log in
  • Create account

© 2026 WAnimals. All rights reserved.

Terms of servicePrivacyCookiesLegal notice
MapSpeciesParksDiving
  1. Home
  2. Species
  3. Large Ground-Finch

One of the 4 finches on WAnimals

Birds · Passeriformes · Thraupidae

Large Ground-Finch

Geospiza magnirostris

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

The large ground finch is the largest of Darwin's finches and the one with the stoutest bill, able to crack the hardest seeds in the archipelago. It is one of the species behind the longest field study of evolution in action in the world: from 1973, Peter and Rosemary Grant spent forty years measuring the bills of the finches of Daphne Major island and documenting how they changed from one generation to the next with droughts and rains.

Weight

30 g – 40 g

Size

15 cm – 17 cm

Life expectancy

12 years

Diet

Herbivore

Feeds mainly on plants.

Activity

Diurnal

Active mainly during the day.

Social structure

In pairs

Usually lives in pairs, sometimes for life.

DesertIslands
1countries1parks7same family

Fun facts

  • GeneralOne of Darwin's finches: the size of its bill shifts with the droughts.
  • The Grants documented evolution happening in real time: after the drought of 1977 only the individuals with the largest bills survived, able to crack the last hard seeds, and the average bill size of the population increased measurably within a single generation.
  • In 1981 a hybrid male from another island arrived on Daphne Major, and within three generations his descendants had formed a reproductively isolated lineage: a speciation event watched from beginning to end by human beings.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (bird)
Habitat and environment
Dry lowland scrub and arid zones with cacti in the Galápagos Islands
Birth weight
Altricial: born blind, naked or with sparse down and entirely dependent
Size at birth
Altricial: born blind, naked or with sparse down and entirely dependent
Sexual maturity
12 months
Gestation / incubation
12 days of incubation
Litter / clutch size
4 eggs

Sources consulted: Wikipedia (es): Geospiza magnirostris

Where to find it

Best time: All year round in the Galápagos, by day; between January and April, with the rains, song and breeding intensify.

Loading map…

The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Large Ground-Finch — same habitat, park, country, tags or family.

Shares a park
Same taxonomic family
Shares a park
Shares a park
Shares a park
Shares a park

Keep exploring

Based on what we already know about large ground-finch.

Share an experience, a fun fact or a tip for seeing the large ground-finch.
See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano
See its range on the interactive map→
Galápagos National ParkEcuador
Peruvian BoobyLeast Concern

Peruvian Booby

Sula variegata

Least Concern

Paradise Tanager

Tangara chilensis

Blue-footed BoobyLeast Concern

Blue-footed Booby

Sula nebouxii

Magnificent FrigatebirdLeast Concern

Magnificent Frigatebird

Fregata magnificens

Vulnerable

Common Land Iguana

Conolophus subcristatus

Short-eared OwlLeast Concern

Short-eared Owl

Asio flammeus

CountriesEcuador
ParksGalápagos National ParkEcuador
TagsHerbivore
Herbivore
Diurnal
In pairs
Bird
Desert
Islands
Ecuador