eunach

• Covey of partridges
• Hide of pheasants
• Wisp of snipe
• Bevy of quails
• Flight or doyes of swallows
• Muster of peacocks
• Siege of herons
• Building of rooks
• Brood of grouse
• Plump of wildfowl
• Stand of plovers
• Cast of hawks
• Watch of nightingales
• Clattering of choughs
• Flock of geese
  source: Alexander Robert Forbes, Gaelic Names of Beasts, 1905, p 236

I always like to hear/read the different collective names for animals, they're never samey.