Great-tailed Grackle (Quiscalus mexicanus)
About the Great-tailed Grackle
The great-tailed grackle or Mexican grackle (Quiscalus mexicanus) is a medium-sized, highly social passerine bird native to North and South America. A member of the family Icteridae, it is one of 10 extant species of grackle and is closely related to the boat-tailed grackle and the extinct slender-billed grackle. In the southern and southwestern United States, the grackle is sometimes referred to simply as a "blackbird" or (erroneously) a "crow" due to its glossy black plumage; however, grackles form their own unique genus that is separate from other "blackbirds", such as the red-winged and Brewer's blackbirds, despite being in the same family (Icteridae). Superficially, Brewer's blackbird is one of the most visually similar species to grackles.
Ecology and behavior
As a member of the Icteridae, this species is associated with marshes, grassland, fields, woodland edges and towns. It typically feeds by insects, seeds, fruit and sometimes nectar or vertebrate prey. That combination of habitat and feeding behavior explains where the bird is easiest to find and why it may be heard more often than seen. Across its range, recorded examples are linked to Ecuador, Panama. Local habitat can change the exact impression of the voice, but the useful field method stays the same: note the perch, surrounding vegetation, and whether the bird repeats one phrase or gives separate contact sounds.What to listen for
Voices vary from liquid or musical notes to harsh checks and bold display songs; posture and habitat are strong evidence. The recordings on this page are labeled here as song, call. Compare each phrase in three passes. First follow the rhythm and repetition. Then judge whether the tone is clear, burry, buzzy, rounded or harsh. Finally notice the pitch direction and the spacing between statements. These three features are more reliable than trying to translate the sound into words alone. A useful field note should describe the whole phrase before naming the bird. For this species, write whether the sound stays level, rises or falls, how long each series lasts, and whether the bird seems exposed, hidden in cover, or associated with a particular edge between habitats. Those details make the recording transferable to a real outdoor encounter.A field note on this voice
When you are most likely to hear this voice
The recordings featured here were made in August, July. Those months may offer a useful seasonal clue, but vocal activity can vary widely across regions and years. Weather, latitude, food availability and local breeding cycles may all influence when a bird chooses to sing. Think of the timing as a starting point rather than a rule. The examples on this page come from recordings made in Ecuador. In the field, behavior and habitat often provide stronger evidence than the calendar alone.
Time of day
The collection includes both morning and later-day recordings; the average time is around 07:00. Many birds are especially vocal in the early hours, when sound may carry well and singing can be a regular part of the morning. Birds may also vocalize later in the day while feeding, moving between perches, interacting with nearby individuals or responding to changes around them. Listening conditions can change how a sound is perceived. Returning to the same recording at different times and imagining the surrounding cover, light and weather can make the context easier to hear.
What this vocalization may suggest
This page contains a song rather than a simple call. Songs are often longer, more structured and more repetitive than short calls. A clear phrase repeated at regular intervals can be associated with breeding activity or the defense of space, although the exact context is best confirmed by observation. Shorter notes may accompany movement, alertness or contact with nearby birds. Faster, louder or harsher delivery can sometimes reflect heightened interaction, while an evenly spaced performance may simply be routine. Notice the surrounding behavior before deciding what the sound might mean.
Understanding pitch
High notes do not automatically indicate courtship, and low notes do not necessarily signal alarm. Pitch works alongside rhythm, repetition, volume and tone. A high, clear phrase may be a territorial song, while high, irregular notes might suggest agitation; some low, soft sounds may simply help birds stay in contact. Rather than focusing on pitch alone, observe what the bird is doing before and after the sound. The most useful field note combines the voice with place, time and behavior.
Editor's note
These interpretations are intended as listening guidance based on the available recordings and context, not as proof of an individual bird's intent. Strong observations note the date and time, habitat, perch height, weather and behavior before and after the vocalization.
A real field recording of the Great-tailed Grackle. Press play and focus on the rhythm and pitch of each phrase.