Short answers, pulled from the story.
Napoleon distributed the first French Imperial Eagles on the 5th of December 1804, three days after his coronation. The ceremony was later depicted in an 1810 painting by Jacques-Louis David titled The Distribution of the Eagle Standards.
The original French Imperial Eagle was sculpted by Antoine-Denis Chaudet. Copies were cast in the workshop of Pierre-Philippe Thomire. The bronze figure stood 310 mm tall, measured 255 mm wide, and weighed 1.85 kg.
The first eagles taken by British troops were captured during the 1809 invasion of Martinique, including the eagle of the 82nd Line Infantry Regiment. A more famous British capture followed at the Battle of Barrosa on the 5th of March 1811, when Sergeant Patrick Masterson of the 87th Regiment of Foot seized the eagle from its dying bearer, Lieutenant Gazan.
A French Imperial Eagle belonging to the 1st Regiment de Grenadiers was stolen from the Isabella Stewart Gardner Museum in Boston, Massachusetts in 1990 and has not been recovered. In May 2015, the museum offered a reward of $100,000 for its safe return.
When Napoleon returned in 1815 and ordered new eagles produced, the replacements were of lesser quality than the originals. The new models had closed beaks and were set in a more crouched posture, distinguishing them from the open-beaked originals cast by Thomire.
The Blues and Royals and the Royal Anglian Regiment wear the eagle as an arm badge. The cap badge of the Royal Scots Dragoon Guards features an eagle. The Royal Irish Regiment wear the eagle of the 8th on the back pouch of the officers' black cross belt.