Great-Tailed Grackle

In 1980, the great-tailed grackle did not live in Shreveport. By 2000, the great-tailed grackle lived in every Shreveport parking lot that had a dumpster within walking distance. The range expansion of the great-tailed grackle (Quiscalus mexicanus) across North Louisiana over the past four decades amounts to one of the more impressive land grabs in regional ornithology, accomplished without stealth, without subtlety, and at a volume that has generated actual noise complaints from municipalities trying to figure out what to do about the birds roosting in the trees downtown. The great-tailed grackle saw the modern American commercial landscape and recognized an ecological opportunity that no native bird had fully exploited. The strip malls. The fast food parking lots. The gas stations. The grocery store dumpsters. The bird moved in. The bird brought friends. The bird has not indicated any plans to leave. What a Great-Tailed Grackle Looks Like The male: large, glossy black with a purple sheen, carrying a long, heavy, keel-shaped tail that makes up close to half his total length. Yellow eyes stare out of the glossy black face with an intensity that lands somewhere between intelligent and unhinged depending on the observer's history with the species. The iridescence fires blue-purple in direct sun. From a distance, the male great-tailed grackle on a light pole in a parking lot gives you "very large, very black bird with too much tail and strong feelings about the parking situation." The female wears brown, smaller, with a shorter tail, lighter breast, and yellow eyes that match the male's. She could pass for a different species standing next to him. The size difference between males and females stretches extreme, with males sometimes reaching twice the female's weight. A male great-tailed grackle next to a female could pass for a before-and-after shot for a bird growth supplement that works too well. Separating the great-tailed from the boat-tailed grackle in the overlap zone: the great-tailed male has yellow eyes in North Louisiana. The boat-tailed male in the western Gulf population has dark eyes. The great-tailed prefers human-modified habitat. The boat-tailed prefers marshes. Yellow eyes in the Walmart parking lot: great-tailed. Dark eyes in the cattail marsh: boat-tailed. The system works. The Sounds a Great-Tailed Grackle Makes The great-tailed grackle's vocal repertoire sounds like someone fed a synthesizer, a rusty hinge, and a car alarm into a blender and let the bird sort out the results. Harsh ascending whistles, mechanical clicking, grating rattles, liquid warbles that almost sound musical before getting cut off by a mechanical failure. The male display call blasts as a loud, rising, whistled scream delivered with the bill pointed skyward and the body fully puffed, and the sound carries across a parking lot with enough volume to turn heads at the gas pump. The roost noise has achieved legendary status. Great-tailed grackles gather in communal roosts of hundreds to thousands of birds, typically in trees along commercial strips, in shopping center landscaping, or in downtown street trees. The collective vocalization from a full roost at dusk drowns out traffic, conversation, and the ambient noise of a functioning city block. Municipalities have tried sonic deterrents, tree trimming, owl decoys, and strongly worded municipal resolutions. The grackles remain. The grackles have always remained. The grackles will continue to remain until the trees come down, and possibly after that. The female's call: a harsh, rapid chatter with a specific scolding quality. The chatter shows up during feeding, during nest defense, and during interactions with other females that amount to arguments and definitely function as arguments. The colony soundscape from dawn to dark during the breeding season amounts to a continuous vocal event, with every bird contributing to organized chaos. What a Great-Tailed Grackle Eats Everything in the human food chain and everything outside it. French fries, bread crusts, taco shells, insects, lizards, small frogs, berries, seeds, grain, pet food left on porches, scraps from outdoor dining areas, contents of open trash cans, and whatever else the modern American landscape makes available. The great-tailed grackle eats what the parking lot offers with the same enthusiasm it eats what the field offers, which explains why the bird followed the parking lots north. The diet flexibility stretches wider than most people realize. A great-tailed grackle in a pecan grove eats pecans. The same bird at a crawfish boil eats crawfish scraps. The same bird at a construction site eats whatever the workers dropped. The bill handles everything from hard seeds to soft insects to the structural integrity of a discarded chicken nugget. The bird does not specialize. The bird optimizes. Natural diet in non-urban settings covers insects, seeds, and small vertebrates. A great-tailed grackle working a freshly mowed field eats grasshoppers and crickets with the same efficiency it eats french fries in a fast food lot. The bird's ecological success comes from the ability to eat both, switch between both, and prefer whichever one shows up more available at the moment. What a Great-Tailed Grackle's Life Actually Looks Like Polygynous. The dominant male at a colony site mates with multiple females, defends the colony area through display and aggression, and contributes nothing to nest construction, egg incubation, or chick feeding. His job description covers looking impressive and preventing other males from looking impressive in the same area. He takes this job seriously. The display blasts full-volume vocalization, full tail fan, wings spread, bill skyward, and an overall body posture that communicates "this parking lot tree belongs to me and everything under it falls within my jurisdiction." Females build nests in colony trees, typically in the ornamental trees that line shopping center parking lots, fast food restaurant landscaping, and suburban street plantings. The nest sits between eight and thirty feet up, a bulky cup of grass, weeds, and whatever building material the immediate environment offers, which in urban settings sometimes includes string, plastic, paper, and strips of material that started life as human garbage and ended life as grackle architecture. She lays three to five eggs, sits on them for about thirteen days, and feeds the babies for about two weeks after hatching. The male, during all of this, has been displaying from the top of the parking lot light pole and chasing subordinate males away from the colony tree. He views this as sufficient. The females handle everything structural. The male handles everything theatrical. Colony nesting in human-modified landscapes creates specific conflicts. The noise, the droppings accumulating under roost and colony trees, and the aggressive behavior toward people who walk under nesting trees all generate complaints. A great-tailed grackle colony in a grocery store parking lot tree means every shopper who parks under that tree learns something about grackle territorial defense. The lessons tend to be memorable. What Gets Confused With a Great-Tailed Grackle The boat-tailed grackle creates the only significant identification challenge. Yellow eyes versus dark eyes in the western Gulf population. Parking lot versus marsh. The visual separation cuts clean enough that habitat alone settles most encounters. The female separation gets harder: both species' females look brown, warm-breasted, and similar in proportions. Eye color helps. Habitat helps more. Common grackles come in smaller and shorter-tailed. A great-tailed grackle next to a common grackle turns the common grackle into a junior version that hasn't finished growing. The size difference reads clearly at any distance where both birds appear in the same field of view. European starlings share the urban habitat and the dark, glossy appearance at a distance. A starling next to a great-tailed grackle: tennis ball next to a softball. The size, tail length, and overall proportions end the comparison before it starts. Predators Red-tailed hawks, Cooper's hawks, and great horned owls take adult great-tailed grackles. The bird's habit of roosting in exposed trees in well-lit parking lots and along commercial strips makes it visible to nocturnal predators that have learned to hunt urban landscapes. A great horned owl at a Shreveport shopping center has access to a roost of several hundred grackles every night, and the owl takes advantage on a schedule that the grackles cannot predict or prevent. Blue jays, crows, rat snakes, and the standard roster of urban-adapted nest raiders hit the nests. The colony's collective defense, mobbing and scolding, works against most daytime predators. The nest's location in commercial landscaping trees puts it within reach of any predator that climbs or flies, but the colony's noise and numbers complicate the approach for anything that prefers stealth. Domestic cats take great-tailed grackles in suburban and urban settings. The bird feeds on the ground frequently enough that cat predation gets real. A grackle working the parking lot perimeter at ground level occupies the strike zone of any cat watching from under a parked car. The grackle has been focused on a french fry. The cat has been focused on the grackle. One of these focus areas will pay off sooner than the other. The Range Expansion The great-tailed grackle's northward push across the southern United States counts as one of the more dramatic range expansions of any North American bird in the twentieth and twenty-first centuries. Historical range sat in Mexico and the extreme American Southwest. Agricultural irrigation in Texas created the food and water sources the species needed to push north. Suburban development provided roost trees and nest sites. The fast food industry provided a supplemental diet. Every element of the modern southern landscape conspired to open the door, and the bird walked through it with the confidence of someone who had been invited. The expansion reached North Louisiana in the late twentieth century and continues today. New territories establish on the expanding front as individual birds, typically young males, push ahead of the main population. A single male great-tailed grackle displaying from a parking lot light pole in a town that had no great-tailed grackles the previous year stands at the leading edge of a range expansion that has been moving for over a century. The bird on the light pole does not know he represents anything. The bird on the light pole found a parking lot with food waste and a tree and considered the arrangement complete. The expansion shows no signs of slowing. Climate, food availability, and roost site abundance all favor continued northward movement. The bird that was not in Shreveport in 1980 now breeds in every commercial district in the Ark-La-Tex. The bird that was not in Monroe in 1990 now roosts in the downtown trees. The trajectory points one direction. The grackle stays patient. The parking lots stretch north. Great-Tailed Grackles and Humans The relationship gets complicated. The great-tailed grackle thrives in human-modified landscapes more successfully than almost any other native bird, which means the species benefits directly from every parking lot, shopping center, and fast food restaurant built in the coverage area. The bird tracked human development northward across Texas and into Louisiana, following the food waste, the irrigated agriculture, and the ornamental trees that provided roost and nest sites. The expansion moved parallel to suburban sprawl. The bird did not cause the sprawl. The bird read the sprawl correctly and moved in. The noise complaints get real. A roost of several hundred great-tailed grackles in downtown Shreveport or Monroe street trees at dusk generates a wall of sound that residents, business owners, and city officials have tried to address through every available method short of removing the trees. Sonic deterrents work temporarily. The birds adjust. Pruning the trees works until the canopy regrows. The birds return. The fundamental problem: the habitat the city planted as landscaping functions perfectly as grackle habitat, and the city cannot remove the habitat without removing the landscaping. The bird and the beautification committee want the same trees for different reasons. The great-tailed grackle's success story reads as a case study in ecological flexibility. A bird that can eat anything, nest anywhere with a tree, tolerate any level of human activity, and communicate at volumes that override urban noise has found the modern American landscape perfectly suited to its needs. Nobody designed the landscape for the bird. The bird designed nothing. The bird showed up, assessed the situation, and found the situation acceptable. The french fries sealed the deal. Where to Find Great-Tailed Grackles in North Louisiana Any commercial parking lot, shopping center, fast food restaurant, gas station, or strip mall in the Shreveport-Bossier area, Monroe, Ruston, Natchitoches, or Alexandria. The bird lives where people shop, eat, and park cars. Finding a great-tailed grackle in the coverage area takes roughly the effort of finding a fast food restaurant, which in North Louisiana takes roughly the effort of looking up from whatever you're doing. Roost sites concentrate in downtown street trees and commercial landscaping during the non-breeding season. Dusk at any major shopping center or downtown area during fall and winter brings hundreds to thousands of grackles streaming in from feeding areas across the surrounding landscape. The pre-roost assembly lands as loud as anything in North Louisiana ornithology and as easy to find as following the noise. During breeding season, colony sites in parking lot trees stay active from March through July, with displaying males on light poles and females building nests in the ornamental oaks and magnolias that line the commercial strips. The bird breeds in the same habitat it feeds in, which means the breeding population sits in plain sight of everyone who drives to a store between March and July. More Information The Cornell Lab of Ornithology's All About Birds page covers great-tailed grackle range maps including the active expansion front, sound recordings, and the full suite of the species' remarkable vocal repertoire. The song recordings capture the synthesizer-meets-car-alarm quality that no written description conveys. The Sibley Guide to Birds covers the great-tailed alongside the boat-tailed grackle with comparison illustrations that address the identification challenge in the overlap zone. For the range expansion specifically, published research on the species' northward movement across the southern United States documents the pace, the mechanisms, and the ecological conditions that drive the spread. Experiencing Great-Tailed Grackles: Accessibility Notes The great-tailed grackle announces everything at maximum volume. The male display call, a loud ascending whistle-scream lasting about two seconds, carries across an entire parking lot and cuts through traffic noise, music, and conversation. The mechanical clicks, grating rattles, and harsh chatters that fill the spaces between display calls layer into a soundscape that stays continuous and chaotic during breeding season. Nothing else in a North Louisiana parking lot makes these sounds. Starlings chatter. House sparrows chirp. The great-tailed grackle has been running a sound check for a show nobody requested, and the sound check never ends. From any vehicle in any commercial parking lot in the Shreveport-Bossier area, Monroe, or any other city in the coverage area, the grackle's voice arrives without effort year-round. Dusk roost assembly delivers the loudest period, with hundreds of birds vocalizing simultaneously from whatever trees the commercial district planted. The volume during roost assembly carries multiple blocks. The species can be experienced entirely from a parked car at any shopping center, and the experience will be thorough, because the bird has never once performed at anything less than full commitment.

Accessibility

Watching Great-Tailed Grackles: Accessibility Notes

The "weeee-oh" contact call carries across parking lots at volumes requiring no effort to detect, if you're within two hundred feet of a great-tailed grackle congregation, you already know it's there. The mechanical display screech, delivered from spread-tail posture by males during breeding season, identifies itself by sheer improbability. Both calls load easily in Merlin and Merlin's Sound ID identifies great-tailed grackle reliably, including the display vocalizations.

The full evening congregation experience, hundreds of birds calling simultaneously from ornamental trees, delivers a complete audio introduction to the species from a car window without any additional effort.

Mobility-limited visitors will find great-tailed grackles in commercial areas throughout Shreveport, Bossier City, and De Soto Parish year-round and fully accessible from vehicles. The birds forage in parking lots at close range with minimal concern about parked vehicles or stationary observers.