Head to head
Thrush vs Blackbird
Blackbird is a strange case in this comparison, because in Europe a blackbird simply is a thrush, one particular species among many, while in America the name was reused for a completely different, unrelated bird. Untangling the two tells you more about naming history than about biology.
| Thrush | Blackbird | |
|---|---|---|
| Relationship | A worldwide family, Turdidae | European blackbird is a thrush; American blackbirds are Icterids |
| Typical build | Plump, ground-feeding, spotted young | Slimmer, often glossy, non-spotted young (Icterids) |
| Song | Often rich and fluting | European: fluting; American Icterids: harsher, buzzy calls |
| Range | Every continent except Antarctica | Europe (thrush) or the Americas (Icterid) |
| Famous member | American robin, song thrush | European blackbird (a thrush) or red-winged blackbird (an Icterid) |
| Diet | Worms, insects, berries | Similar for the European blackbird; seeds and insects for Icterids |
| Shoulder markings | None typical | Icterid males often show bold red or yellow patches |
| Family size | About 170 species | One species (European) or around 100 species (Icteridae) |
Thrush vs Blackbird: common questions
Is a blackbird a type of thrush?
The European common blackbird, Turdus merula, is indeed a true thrush, a member of the family Turdidae, closely related to the American robin and the song thrush, and it shares the family's typical build, ground-feeding style, and spotted juvenile plumage before adult males turn solid black. The various American birds also called blackbirds, however, including the red-winged blackbird, are not thrushes and belong instead to the unrelated family Icteridae, so whether a blackbird is a thrush depends entirely on which blackbird is meant.
Why does the same word cover two unrelated groups of birds?
The pattern traces back to European colonists naming unfamiliar American wildlife after animals they already knew from home based on a passing resemblance rather than any actual relationship. A dark, glossy American bird gathering in flocks over farmland looked enough like the familiar European blackbird, itself a common garden thrush, that settlers simply reused the name, even though the American birds turned out to belong to an entirely different family. The same naming pattern produced the American robin, named for an unrelated red-breasted European bird, and several other transplanted bird names.
How can you tell a true thrush from an American Icterid blackbird?
Look at the bill, the build, and the young. Thrushes typically have a slimmer, straighter bill suited to picking invertebrates and berries, a plump, rounded body, and, in most species, distinctly spotted or scaled juvenile plumage that is a strong family signature. American Icterid blackbirds generally have a slightly more pointed, conical bill suited to a mixed seed-and-insect diet, a leaner build, and juveniles that are usually streaked brown rather than clearly spotted, plus many Icterid males show bold colour patches, such as the red-winged blackbird's red-and-yellow shoulder, that no true thrush displays.