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
The two dark birds raiding your feeders. Three instant checks:
- Tail: long and folded into a keel in flight = grackle; short and square = starling.
- Eye: staring pale-yellow eye = grackle; dark eye = starling.
- Spring bill: bright yellow = starling; black year-round = grackle.
At-a-Glance Comparison Table
The grackle and the starling, mark by mark. 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; keeled in flight | Short, squared |
| Eye | Pale yellow | Dark |
| Bill | Heavy, black all year | Pointed; yellow in spring and summer, dark in winter |
| Plumage | Iridescent purple head, bronze body | Glossy green-purple with buff speckles |
| Size | 12.5 in, long-legged | 8.5 in, compact |
| Walk | Long, deliberate strides | Quick, busy, jerky steps |
| Voice | Squeaky “readle-eak”, harsh “chack” | Squeaks, rattles, whistles and mimicry |
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 a native blackbird of the East and central US, gathering in huge winter roosts.
The European Starling — released in New York in 1890 — now occupies the whole continent, cities to farmland, year-round.
Feeder Behavior & Favorite Foods
- Grackle: cracked corn, sunflower — dominates platforms in gangs.
- Starling: suet — a flock can strip a cake in an hour.
- Defense: upside-down suet feeders stop starlings; caged feeders stop both.
- Safflower is less attractive to both species than sunflower.
Temperament & Flock Behavior
Common Grackles swagger — soaking food in birdbaths, robbing nests, mobbing in loud flocks.
European Starlings are frantic — probing lawns, squabbling at suet, wheeling in murmurations at dusk.
6-Step Backyard ID Checklist
- Tail. Long keel = grackle; short = starling.
- Eye. Pale yellow = grackle; dark = starling.
- Bill. Yellow = starling (breeding); black = either.
- Speckles. Speckled = starling; glossy uniform = grackle.
- Walk. Long strides = grackle; busy steps = starling.
- Flock. Murmuration = starling; horde = grackle.
Frequently Asked Questions
How do you tell a grackle from a starling at a glance?
Look at the tail: grackles drag a long, keel-shaped tail; starlings have a short, square one. Then the eye — pale yellow on a grackle, dark on a starling.
Which bird has the yellow bill?
The starling — in breeding season its pointed bill turns bright yellow. Grackle bills stay black.
Are grackles invasive?
No — grackles are native blackbirds. Starlings are the introduced species, released in 1890.
Which one empties the suet?
Starlings — they attack suet in flocks. Grackles prefer seed and corn.
What is a murmuration?
A swirling flock of thousands of starlings — grackles form looser, straggling flocks instead.
Can either bird talk?
Starlings are excellent mimics, copying other birds and even mechanical sounds; grackles only squeak and chack.
Key Takeaways
- Tail: Long keel = grackle; short = starling.
- Eye: Pale = grackle; dark = starling.
- Bill: Yellow in spring = starling.
- Speckles: Speckled = starling.
- Status: Grackle native; starling introduced.
- Feeders: Starling loves suet; grackle loves corn.