Reindeer

 I was doing a bit of research on the reindeer wiki page, and I noted the following info on notable persons mentioned: 

Ulisse Aldrovandi (11 September 1522 – 4 May 1605)

Conrad Gessner (26 March 1516 – 13 December 1565) 

Charles Hamilton Smith (26 December 1776 – 21 September 1859) 

Carl Linnaeus (23 May 1707 – 10 January 1778)

Albertus Magnus (c. 1200 – 15 November 1280)

Alexander William Francis Banfield (March 12, 1918 – March 8, 1996)

Valerius Geist (2 February 1938 – 6 July 2021)

Ian McTaggart-Cowan (June 25, 1910 – April 18, 2010)

Peter Grubb (1942 – 23 December 2006)

Glover Morrill Allen (February 8, 1879 – February 14, 1942) 

Joel Asaph Allen (July 19, 1838 – August 29, 1921)

Gaius Julius Caesar^[a] (12 July 100 BC – 15 March 44 BC) 

Albert of Prussia (17 May 1490 – 20 March 1568)

The tapetum lucidum of Arctic reindeer eyes changes in color from gold in summer to blue in winter to improve their vision during times of continuous darkness, and perhaps enable them to better spot predators