Species Comparisons • Backyard Identification
Common Grackle vs European Starling
Common Grackle
Common Grackle • Wikimedia Commons
Common Grackle
Common Grackle • Wikimedia Commons
Common Grackle
Common Grackle • Wikimedia Commons
Common Grackle
Common Grackle • Wikimedia Commons
European Starling
European Starling • Wikimedia Commons
European Starling
European Starling • Wikimedia Commons
European Starling
European Starling • Wikimedia Commons
European Starling
European Starling • Wikimedia Commons
Common Grackle vs European Starling (Quiscalus quiscula vs Sturnus vulgaris): The Complete Backyard Identification Guide
Field Summary
Quick Answer: The Fastest Way to Tell Them Apart
Two dark yard birds people mix up daily. Three rules:
- Tail: long and keel-shaped = grackle; short and square = starling.
- Eye: pale yellow = grackle; dark = starling.
- Bill in spring: black = grackle; bright yellow = starling.
At-a-Glance Comparison Table
The native blackbird and the introduced starling, side by side. KEY rows separate fastest.
| Feature | Common Grackle | European Starling |
|---|---|---|
| Scientific Name | Quiscalus quiscula | Sturnus vulgaris |
| Length | 12.6 in (32 cm) | 8.5 in (21.5 cm) |
| Wingspan | 14–18 in (36–46 cm) | 16 in (41 cm) |
| Weight | 2.6–5.0 oz (74–142 g) | 2.1–3.4 oz (60–96 g) |
| Overall Shape | Large, long-tailed iridescent blackbird with a pale eye | A stocky, short-tailed, speckled blackbird with a pointed bill |
| Male Plumage KEY | Iridescent blue-purple head, bronze-black body, long keel-shaped tail, pale yellow eye | Glossy purple-green-black in breeding plumage with a yellow bill; heavily speckled in winter (sexes alike) |
| Female Plumage | Like the male but smaller and duller, with less iridescence | Identical to the male |
| Bill Shape | Long, heavy, black, slightly decurved | Yellow in spring and summer, dark in winter — long and pointed |
| Tail KEY | Very long, folded into a deep V (keel) in flight | Very short, squared |
| Core Range | East of the Rockies — fields, wetlands, suburbs and parks | Nearly continent-wide — cities, farms and suburbs everywhere |
| Migration | Partial migrant; huge mixed blackbird flocks in fall and winter | Mostly resident; huge wheeling winter murmurations |
| Feeder Presence | Descends on feeders in flocks for cracked corn and sunflower; dominates smaller birds | Swarms suet and seed feeders in gangs — a classic feeder bully |
| Favorite Foods | Grain, insects, eggs, nestlings, small fish and frogs, refuse | Insects, seeds, fruit, garbage — a generalist omnivore |
| Song | A harsh, squeaky “readle-eak” like a rusty gate hinge | A jumbled, squeaky medley with whistles and mimicry |
| Flight Call KEY | A sharp “chek” | A descending “tcheer” and metallic squeaks |
| Population Trend | Still abundant but declining; fall flocks can number in the thousands | Abundant introduced species; competes with native cavity nesters |
Male Field Marks, Side by Side
Common Grackle — Male
Quiscalus quiscula
- Iridescent blue-purple head on a bronze-black body.
- Pale yellow eye and long keel-shaped tail.
- Bigger and longer-tailed than any blackbird or starling.
European Starling — Male
Sturnus vulgaris
- Glossy speckled black, yellow bill, very short tail.
- Squeaky, musical, mimicking jumble of a song.
- Gangs take over suet feeders in minutes.
Female & Juvenile Marks, Side by Side
Common Grackle — Female
Quiscalus quiscula
- Smaller and duller than the male, same pale eye.
- Joins mixed blackbird flocks at dusk roosts.
- Walks lawns with a deliberate, long-strided gait.
European Starling — Female
Sturnus vulgaris
- Identical to the male.
- Nests in any cavity — evicting bluebirds and woodpeckers.
- Winter murmurations wheel in the thousands.
Part-by-Part Anatomy Breakdown
Every part offers a check:
| Body Part | Common Grackle | European Starling |
|---|---|---|
| Tail | Very long, folded into a keel in flight | Short, squared |
| Eye | Pale yellow | Dark |
| Iridescence | Purple head, bronze body | Green-purple gloss with pale speckles |
| Spring Bill | Heavy, black | Pointed, bright yellow |
| Winter Plumage | Stays glossy black | Heavily speckled buff-white |
| Walk | Long, deliberate strides | Quick, busy steps |
| Flocking | Huge winter roosts with blackbirds | Tight wheeling murmurations |
Song & Call Comparison
Common Grackle
Quiscalus quiscula
Song: a harsh, squeaky readle-eak — the rusty-hinge song.
Calls: a sharp chek; huge roost flocks are deafening.
Common Grackle voice • Wikimedia Commons
European Starling
Sturnus vulgaris
Song: a jumbled squeaky medley with whistles, clicks and mimicry.
Calls: a descending tcheer and metallic squeaks.
European Starling voice • Wikimedia Commons
Range & Seasonal Presence
The Common Grackle is native to the East and central US, expanding west; winter roosts gather thousands.
The European Starling — released in New York in 1890 — now blankets the continent in cities, farms and suburbs year-round.
Feeder Behavior & Favorite Foods
- Common Grackle: dominates platform feeders for cracked corn and sunflower; travels in gangs.
- European Starling: suet specialist — a flock can strip a suet cake in an hour.
- Defense: upside-down suet feeders and cages exclude starlings and grackles while admitting woodpeckers and chickadees.
- Both mimic: grackles squeak and starlings imitate hawks, car alarms and other birds.
Temperament & Flock Behavior
Common Grackles are bold, social and resourceful — they soak dry food in birdbaths and rob nests.
European Starlings are frenetic competitors that take over nest cavities and feed in dense, murmuring flocks.
6-Step Backyard ID Checklist
- Tail. Long keel = grackle; short = starling.
- Eye. Pale yellow = grackle; dark = starling.
- Bill. Yellow (spring/summer) = starling; black = grackle.
- Speckles. Heavy buff speckles = starling; glossy uniform = grackle.
- Walk. Long strides = grackle; busy steps = starling.
- Flock shape. Wheeling murmuration = starling; straggling horde = grackle.
Frequently Asked Questions
How do you tell a grackle from a starling?
Grackles are larger with a very long keel-shaped tail and a pale yellow eye. Starlings are compact with a short tail, dark eye, speckled plumage and a yellow bill in spring.
Which one is native?
The Common Grackle is a native blackbird. The European Starling was introduced to New York in 1890.
Why do starlings ruin my suet?
Starlings love suet and feed in flocks. Use an upside-down or caged suet feeder to exclude them.
What is a murmuration?
A wheeling, shape-shifting flock of thousands of starlings — grackles form looser, straggling flocks instead.
Do grackles migrate?
Northern grackles move south in winter and join huge mixed roosts with other blackbirds; starlings are largely resident.
Can starlings mimic sounds?
Yes — starlings are accomplished mimics, imitating hawks, songbirds and even mechanical noises.
Key Takeaways
- Tail: Long keel = grackle; short = starling.
- Eye: Pale yellow = grackle; dark = starling.
- Bill: Yellow in spring = starling.
- Speckles: Speckled = starling; glossy = grackle.
- Origin: Grackle native; starling introduced.
- Flock: Murmuration = starling.