For example, the male great-tailed grackle is 60% heavier than the female.

Because of their loud vocalizations, great-tailed grackles are considered a pest species by some.

Great-tailed grackles are noted for their diverse foraging habits.

Great-tailed grackles have an unusually large repertoire of vocalizations that are used year-round.

The species was closely related to the western clade of the great-tailed grackle, from which it diverged around 1.2 million years ago.

The boat-tailed grackle was once considered the same species as the great-tailed grackle.

"We found that male great-tailed grackles were significantly glossier than females," Mr Toomey says.

Great-tailed grackles, particularly the adult males, have a keel-shaped tail that they can fold vertically by aligning the two halves.

The great-tailed grackle and boat-tailed grackle were considered the same species until genetic analyses distinguished them as two separate species.

The range expansion of the great-tailed grackle (Quiscalus mexicanus Gmelin) in North America since 1880.

Quiscalus mexicanus (Great-tailed grackle)

The similar great-tailed grackle (Quiscalus mexicanus) overlaps with it in range but is larger with a longer tail and larger bill.

On average, the boat-tailed grackle weighs about 10% more than the closely related great-tailed grackle although the male of that species has an even longer tail.

Garrett and I started talking about feral parrots and ended up with hooded orioles, mockingbirds and the elusive great-tailed grackle.

Growth and survival of Great-tailed Grackle (Quiscalus mexicanus) nestlings were monitored over 3 years to determine if greater food demands of sons influenced nestling success.

The first birds for the trip were seen from the bedroom window and these were Brown Pelican, Magnificent Frigatebird and Great-tailed Grackle.

The great-tailed grackle or Mexican grackle (Quiscalus mexicanus) is a medium-sized, gregarious passerine bird native to North and South America.

En-route we will see our first common American birds including Common and Great-tailed Grackles, Red-winged Blackbird and Turkey Vulture.

Birds common to the bay include the wood ibis, roseate spoonbill, snowy egret, great-tailed grackle, Louisiana heron, willet, black-necked stilt, caracara and the black vulture.

He presided over the introduction of the great-tailed grackle into the Valley of Mexico, the earliest documented case of human-mediated bird introduction in the Western Hemisphere.

Great-tailed Grackle Quiscalus mexicanus Common around urban areas Great Cowbird Scaphidura oryzivora One near Esquinas Lodge.

That's because some birds, such as European imports like house sparrows and starlings, but also native birds like the great-tailed grackle, tell you nothing about the quality of a neighbourhood - they're just everywhere.

Originally from Central and South America, great-tailed grackles expanded their breeding range by over 5500% by moving north into North America between 1880 and 2000, following urban and agricultural corridors.

Year-round residents are: greater roadrunner, Gambel's quail, ladder-backed woodpecker, Gila woodpecker, crissal thrasher, great-tailed grackle, verdin, black-tailed gnatcatcher, common yellowthroat sparrow, song sparrow.

To do so, PhD researcher Mr Matthew Toomey from Arizona State University, Tempe, US and colleagues examined wild great-tailed grackles ( Quiscalus mexicanus ), a type of blackbird.

The great-tailed grackle or Mexican grackle (Quiscalus mexicanus) is a medium-sized, gregarious passerine bird native to North and South America.

The range expansion of the great-tailed grackle (Quiscalus mexicanus Gmelin) in North America since 1880.

The similar great-tailed grackle (Quiscalus mexicanus) overlaps with it in range but is larger with a longer tail and larger bill.

Great-tailed Grackle (Quiscalus mexicanus).

Growth and survival of Great-tailed Grackle (Quiscalus mexicanus) nestlings were monitored over 3 years to determine if greater food demands of sons influenced nestling success.

The great-tailed grackle or Mexican grackle (Quiscalus mexicanus) is a medium-sized, gregarious passerine bird native to North and South America.

Thus Haemig has argued that between 1486 and 1502, the great-tailed grackle (Quiscalus mexicanus) was introduced from its original home in Veracruz to the Valley of Mexico by the Aztec Emperor, Auitzotl.