Bulls drop their antlers by January, and pregnant cows and calves retain theirs until spring.
Normally, pregnant cows retain their antlers a week or so after calving for advantage over food resources.
The monarch paid tribute to the British athletes who took part in the Olympic games in Brazil and the staff at the air ambulance base in Cambridge where her grandson Prince William works as a helicopter pilot.
Queen Elizabeth also noted that her husband's Duke of Edinburgh Award Scheme and son Prince Charles' Prince's Trust — both charitable organisations that support young people — had reached significant milestones this year at 60 and 40 years respectively.
The air is getting colder, the nights longer and decorations are appearing in the shops, which can mean only one thing: Christmas is on its way. I’m dreading it.‘I looked at the sitting room full of people I’d never met and I knew I didn’t have it in me to go up to a group, say “hello” and start making small talk,’ he said.