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Small Ground-finch
Tanagers · Resident

Small Ground-finch

Little Ground-finch · Geospiza fuliginosa

Least Concern10–11 cm · 11–14 g

By the Birdfact teamChecked byNathan Cope

A little songbird spotted hopping fearlessly between giant tortoises on the Galápagos Islands, where it plays a starring role in Darwin's theory of evolution.
On this page11 sections
  1. How to recognise it
  2. Its size
  3. Its song and calls
  4. When and where to see it
  5. What it eats
  6. Nesting and breeding
  7. Behaviour
  8. Conservation
  9. More photos
  10. Quick facts
  11. Sources

How to recognise it

The Small Ground-finch is a compact bird with a rounded body and short tail. Males are predominantly black or dark grey, with a distinctive thick, rounded beak. Their plumage is uniform, lacking any striking markings.

Females differ significantly, displaying brown-grey upperparts and buff underparts with streaking. Juveniles resemble females but may have a paler beak. Seasonal plumage changes are minimal in this species.

Its size

Adults
Length
10–11 cm
Wingspan
16–18 cm
Weight
11–14 g

Its song and calls

The Small Ground-finch has a simple but persistent song, consisting of a series of short, high-pitched notes often described as 'tseep-tseep-tseep'.

Their call is a short, sharp 'chip'. During courtship, males may sing continuously from exposed perches to attract mates.

When and where to see it

The Small Ground-finch is not recorded regularly in the UK, Ireland, the United States or Canada.

Worldwide: recorded regularly in 1 country

Countries where it was recorded in at least 3 of the 6 years 2019–2024. Linked countries have their own bird list.

South America (1)
  • Ecuador

Tips for seeing it

  • Look for them on the ground in open areas of the Galápagos Islands
  • Observe their thick, rounded beaks, a key identifying feature
  • Listen for their simple, repetitive songs during the breeding season
  • Watch for their characteristic hopping movement while foraging

What it eats

The Small Ground-finch primarily feeds on seeds, particularly those of grasses and low-growing plants. They also consume small insects and nectar when available.

Their strong, rounded beak is well-adapted for cracking open seeds and manipulating food items on the ground.

Nesting and breeding

Breeding typically occurs during the rainy season, which can vary depending on the island but often falls between December and May. Males establish territories and attract females through song and simple displays.

Nests are dome-shaped structures built in low bushes or cacti, constructed from grasses, twigs, and other plant fibres. Females typically lay 2-4 eggs, which are white with brown speckles.

Incubation lasts about 12 days, with both parents sharing duties. Nestlings fledge after approximately two weeks, but parents continue to feed them for several more weeks after leaving the nest.

Behaviour

Small Ground-finches are primarily terrestrial, hopping along the ground in search of food. They often forage in small groups, pecking at seeds and insects.

During the breeding season, males become territorial and perform simple courtship displays, perching prominently and singing to attract mates.

Conservation

While the Small Ground-finch is currently listed as Least Concern, it faces threats from habitat degradation and introduced predators on the Galápagos Islands.

Conservation efforts focus on preserving native ecosystems and controlling invasive species to protect this and other endemic bird populations.

More photos

4 photos

Quick facts

Length
10–11 cm
Wingspan
16–18 cm
Weight
11–14 g
Lifespan
5–10 years · oldest recorded 15 years
Family
Tanagers
Migration
Resident
Global status (IUCN)
Least Concern
World population
Not quantified, but described as 'common'
Population trend
Stable
Also called
Little Ground-finch
Scientific name
Geospiza fuliginosa

Sources

4
  1. 1BirdLife International. 2024. Geospiza fuliginosa. The IUCN Red List of Threatened Species 2024: e.T22723739A263311084. Source (opens in a new tab)
  2. 2BirdLife International. 2024. Geospiza fuliginosa. The IUCN Red List of Threatened Species 2024: e.T22723739A263311084. Source (opens in a new tab)
  3. 3Stotz et al. (1996)
  4. 4Langton and Kleindorfer, Minimum longevity and age-related male plumage in Darwin's finches on Floreana Island, Journal of Ornithology, 160:351-361 (2019)
Spotted a mistake?Tell usHow we write and checkBy the Birdfact team · Updated

Checked by

Nathan Cope, founder and editor

Nathan founded Birdfact and leads its writers and contributors in the UK, the US and Canada. He has watched and studied birds for more than ten years, and checks every article and species guide before it’s published.

How we write and checkAbout Nathan