What is a group of Grackles called?

A group of grackles is commonly called a Group. Other collective nouns you may see include Flock and Congregation.

A collective noun for grackles is a "plague" of grackles. This term accurately captures the mesmerizing yet overwhelming sight of a large flock of grackles in flight or gathered together. The word "plague" is derived from an Old English word, meaning a swarm or multitude of creatures, which vividly illustrates the immense numbers and social behaviors of these charismatic birds. When a plague of grackles takes flight, their glossy black feathers shimmer in the sunlight, creating a captivating display in the sky. They move together with grace and agility, displaying intricate aerial acrobatics, as if performing a meticulously synchronized dance routine. The collective harmony of their movements instills a sense of awe and wonder. These intelligent and gregarious birds don't restrict themselves to the skies alone. On the ground, they congregate in dense assemblages, painting the landscape monochromatically black. As a swarm, grackles emit a distinctive chorus of calls, which adds a vibrant symphony to the environment they inhabit. A plague of grackles is a dynamic assemblage that navigates the world with a strong sense of unity. Each individual contributes to the larger entity, demonstrating a remarkable cooperation and coordination among themselves. Within this collective unit, grackles exhibit social behavior, often engaging in vocal communication, territorial defense, and cooperative feeding habits. In conclusion, a collective noun for grackles—plague—aptly captures the awe-inspiring sight of these birds when assembled in large numbers. Their harmonious flight patterns and synchronized actions exemplify their cohesive social dynamics. Observing a plague of grackles is a captivating experience that shows us the beauty and power of unity in nature.