Passenger pigeons, sparrows and the threat of extinction are the subject of elegiac concerts where voices swoop and soar

A rich collaboration between an acclaimed French ensemble and a young English choir is rewarding; plus, St Barts’s Great Hall returns to its full glory

Mob rule and a marauding bear feature in sparkling revivals of two of the composer’s lesser-known gems. Plus, a masterclass in high-speed Rossini

Wagner’s great work sails into the modern age in the strangest of venues: a massive working quarry near Vienna