A 'Murder' of Crows: The Dark History Behind One of English's Most Vivid Collective Nouns

Where Collective Nouns Come From

The tradition of formal collective nouns in English — a pride of lions, a parliament of owls, a murder of crows — traces primarily to a single 15th-century text: The Book of Saint Albans, published in 1486 and attributed to a figure named Juliana Berners. The book covered hunting, hawking, heraldry, and fishing, and included a list of collective nouns for animals that was partly practical and partly a game of verbal wit — a way of demonstrating linguistic sophistication.

Many of the collective nouns in The Book of Saint Albans appear to have been invented by the author or by the literate hunting classes as a form of language play rather than reflecting established folk usage. A "murder" of crows is listed there alongside terms like a "parliament" of owls, an "exaltation" of larks, and a "shrewdness" of apes. These terms were designed to be evocative and to assign human qualities or moral associations to animal groups — a parliament governs, an exaltation praises, a murder kills.

Why Crows Got Murder

The assignment of "murder" to crows was not arbitrary — it reflected a deep and widespread association between crows and death that runs through European folklore and literature. Crows and their relatives (ravens, rooks, jackdaws) are carrion-feeding birds that historically appeared at battlefields, gallows, and sites of disease outbreak, where the dead and dying provided easy meals. Their black plumage, harsh calls, and habit of gathering in large numbers at sites of death made them potent symbols of mortality in the pre-modern European imagination.

Medieval folklore attributed crows with the ability to predict death — a belief possibly derived from the observation that crow gatherings often preceded or accompanied human mortality events, because they were attracted by the same conditions (sick animals, carrion, battlefield aftermath) that produced mortality. The causal arrow was reversed in folk interpretation: instead of crows gathering because death had occurred, death was believed to follow because crows had gathered.

The Science Behind Crow Social Behavior

Ironically, modern research has revealed that crow social gatherings — the very behavior that earned them their grim collective noun — are among the most cognitively sophisticated social behaviors observed in non-primate animals. Crow roosts and congregations serve functions that include information sharing about food sources, social learning, mate assessment, and possibly the processing of social information about group members.

Research from the Corvid Cognition Laboratory at the University of Washington has documented crows' ability to recognize individual human faces, remember and communicate information about specific humans across years, and transmit learned information about dangerous individuals to younger crows through social learning. A gathering of crows is not a mindless accumulation of birds but a functional social network operating with cognitive tools that parallel primate social intelligence.

The gap between the medieval "murder" — a name dripping with superstition and projected human evil — and the scientific reality of crow social cognition illustrates how dramatically our understanding of animal intelligence has changed. The crows gathering at the edge of a medieval village were not omens of death but intelligent social animals doing what intelligent social animals do: sharing information, learning from each other, and navigating a complex world together.