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The small tree finch is the smallest and most common of the three Galapagos tree finches — a dainty, insect-hunting Darwin’s finch whose males slowly develop a smart black hood. Here is what it is, what it eats, and where to see it in the trees.
Small tree finch at a glance
- Scientific name: Camarhynchus parvulus
- Size: the smallest of the three tree finches, about 13 g
- Beak: short, stubby and slightly curved
- Diet: insects and spiders gleaned from foliage, plus buds and fruit
- Males: develop a black hood with age
- Where: wooded areas of most main islands
What is it?
The small tree finch (Camarhynchus parvulus) is an endemic Darwin’s finch and the smallest, most common and most widespread of the three tree-finches, at about 13 grams. Its bill is short, stubby and slightly curved — rounder than a ground finch’s — and adult males develop a black hood with age, while females and youngsters are duller. We can build a trip around this. Share your dates and we’ll send a free quote within 24 hours.
What it eats
Its diet is mainly insects and spiders, gleaned from foliage and twigs as the bird hops through trees and shrubs; it also takes some buds and fruit. By feeding up in the canopy it avoids competing with the seed-eating ground finches below — another neat slice of the Darwin’s-finch food supply.
How to tell the tree finches apart
The three tree finches can be tricky. The small tree finch is the smallest, with the daintiest bill; the medium and large tree finches are bigger, with heavier bills. Size and bill shape, along with which island you are on, are the best clues. These small tree finch facts help separate it from its cousins.
Where it lives
The small tree finch habitat spans most of the main islands — though not a few like Española, Genovesa and Marchena — favouring wooded areas from transition zone to humid highland forest. It is listed as Least Concern, although some counts hint at declines, partly from the introduced parasitic fly that troubles many land birds. If you want to see it yourself, start with our 5-day island hopping itinerary.
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Where to see it
Look up into the trees:
- Santa Cruz highlands — Scalesia forest and transition zone.
- Isabela, Santiago and Floreana — wooded areas across the islands.
- In the foliage — watch for a tiny finch gleaning insects from twigs.
Quick Small Tree Finch Facts
A few more facts about the small tree finch:
- Its scientific name is Camarhynchus parvulus, an endemic Darwin’s finch.
- It is the smallest and commonest of the three tree finches.
- Adult males develop a black hood with age.
- It eats mainly insects gleaned from foliage and twigs.
- It lives in wooded areas on most main islands.
Camarhynchus parvulus, the smallest tree finch
The scientific name camarhynchus parvulus marks this bird as the littlest of the three tree finches and, alongside the small ground finch, one of the tiniest of all Darwin’s finches at around 13 grams. It feeds up in the foliage rather than on the ground, working twigs and leaves for insects with a short, neat bill. Of the tree-finch trio it is the most common and the most widespread, turning up in wooded country across most of the main islands.
Telling the three tree finches apart is one of birdwatching’s gentler puzzles, and size is the first clue: this is the small one, with the daintiest bill, while the medium and large species are progressively bigger and heavier-billed. A useful shortcut is location, since the three do not overlap evenly across the archipelago.
Small tree finch diet and black-hooded males
The small tree finch diet is mainly insects and spiders gleaned from foliage and twigs, with some buds and soft fruit. By feeding in the canopy it steps neatly around the seed-eating ground finches below, another small instance of the niche-splitting that keeps so many related finches fed on the same islands. It is an active, restless feeder, rarely still for long.
One quiet pleasure is watching the males change. Young and female birds are a plain olive-brown, but adult males gradually develop a smart black hood with age, so a single tree can hold birds at several stages of maturity. Spotting a fully hooded male is a small reward for anyone who slows down to watch the canopy.
Small tree finch habitat and facts
The small tree finch habitat covers wooded zones from the transition belt up into the humid Scalesia highlands on most of the main islands, though it is absent from a few such as Española, Genovesa and Marchena. It favours leafy cover and is far more often heard — a buzzy, repetitive song — than clearly seen.
A couple of closing small tree finch facts: it is listed as Least Concern, although some counts hint at declines linked to the same introduced parasitic fly that troubles many island land birds. Common and approachable, it is a good species on which to practise the art of telling Darwin’s finches apart.
It is the daintiest of the three tree finches, a little under fourteen grams, and the one you are most likely to meet. Adult males wear a neat black hood that deepens with age, while females and youngsters stay a plainer streaky brown. Its short, stubby, gently curved bill is the giveaway, separating it from its larger cousins more reliably than size alone.
Up in the canopy it lives the life of a small warbler, gleaning insects and spiders from leaves, bark and slender twigs, hanging acrobatically to reach a hidden grub and rounding out the menu with a little fruit and soft plant matter. It rarely comes down to feed on the ground, which is part of what sets the tree finches apart from their seed-cracking ground-finch relatives.
Of all its group it is the most widespread, found across most of the main islands from the dry coastal scrub up into the lush, damp highland forest, though it favours the greener zones. Common and active, it is one of the easier members of the family to watch — a restless little shape working steadily through the foliage, a perfect introduction to the puzzle of telling the finches apart.
Frequently asked questions
What is its scientific name?
Camarhynchus parvulus, the smallest and most common of the three Galapagos tree finches.
What does it eat?
Mainly insects and spiders gleaned from foliage and twigs, plus some buds and fruit.
How do you tell it from the others?
It is the smallest, with the daintiest bill; the medium and large tree finches are bigger with heavier bills.
Do the males change colour?
Yes. Adult males gradually develop a black hood with age, while females and young birds stay duller.
Where can you see it?
In wooded areas on most main islands, especially the Scalesia highlands of Santa Cruz; look up in the foliage.
What do small tree finches eat?
Mainly insects and spiders, which they glean from leaves, bark and twigs up in the canopy, plus a little fruit and soft plant matter. They feed in the trees rather than on the ground, unlike their seed-eating ground-finch cousins.
Meeting the littlest tree finch
The finch rewards anyone who looks up. Catch a black-hooded male working the canopy and you have ticked off the daintiest member of Darwin’s tree-finch trio.
Read more at eBird, or meet the whole family in my guide to Darwin’s finches and the biggest tree finch the large tree finch.
Header photo: Andrew Katsis, CC BY 4.0, via Wikimedia Commons.
