National Geographic : 1939 Feb
Photograph trom Topical fress Agency THE KING'S SWAN MASTER AND HIS CREW BUSY NEAR WINDSOR IN THEIR ANNUAL TASK OF "UPPING" By "upping" is meant the counting and marking of these waterfowl. Protected now by law, admired by the public, and fedbymany children, Thames swans take life easy; in olden times, English people ate them. Nesting in riverside grass, they lay from five to nine olive-colored eggs. Inthebreeding season these birds attack any invader, pound savagely with their stout wings, and emit angry, hissing grunts (Plate I).