Three crows knight's hawk, hound and mistress. "Three crows" are also often implicated in the parliament of crows where three crows preside over a larger number of crows and sit in judgment over the fate of another crow. The verdict sometimes results in a crow being set upon by all the other crows. This behavior and their tendency to show up at battlefields and the scenes of murders may be explain the collective term for crows as being a 'murder of crows'. "Three crows" also refers to a tale of three crows (a father, mother and son crow) bothering the king. There
Mass noun verb number invariability: (a) that seen with mass nouns such as "water" or "furniture", with which only singular verb forms are used because the constituent matter is "grammatically" nondiscrete (although it may ["water"] or may not ["furniture"] be "etically" nondiscrete); and (b) that seen with collective nouns, which is the result of the metonymical shift between the group and its (both grammatically and etically) discrete constituents. Some words, including "mathematics" and "physics", have developed true mass-noun senses despite having grown from count-noun roots. Mass noun In linguistics, a mass noun, uncountable noun, or non-count noun is a noun with the