qT=1&tQ=During World War I, which member of the bird family was used in France to warn of air-raids?&tC=The parrot|The Screech Owl|The Blue Jay|The Homing Pigeon&cC=2&fB=During World War I, parrots were kept caged in the Eiffel Tower to warn of air-raids.<br><br>The parrots' acute hearing enabled them to detect approaching aircraft long before the enemy planes were heard or seen by humans.