Question: How many people were in the British colonies where bison antiquus could be found?

Knowledge 1: Bison antiquus
Bison antiquus, the ancient or antique bison, is an extinct species of bison that lived in North America until around 10,000 years ago (ya). It was one of the most common large herbivores on the North American continent during the late Pleistocene, and is a direct ancestor of the living American bison. [SEP] Knowledge 2: British Empire
Political boundaries drawn by the British did not always reflect homogeneous ethnicities or religions, contributing to conflicts in formerly colonised areas. The British Empire was also responsible for large migrations of peoples. Millions left the British Isles, with the founding settler populations of the United States, Canada, Australia and New Zealand coming mainly from Britain and Ireland. Tensions remain between the white settler populations of these countries and their indigenous minorities, and between white settler minorities and indigenous majorities in South Africa and Zimbabwe. Settlers in Ireland from Great Britain have left their mark in the form of divided nationalist and unionist communities in Northern Ireland. Millions of people moved to and from British colonies, with large numbers of Indians emigrating to other parts of the empire, such as Malaysia and Fiji, and Chinese people to Malaysia, Singapore and the Caribbean. The demographics of Britain itself was changed after the Second World War owing to immigration to Britain from its former colonies.
Knowledge 1: Bison antiquus
During the later Pleistocene epoch, between 240,000 and 220,000 years ago, steppe wisent (B. priscus) migrated from Siberia into Alaska across the Bering Land Bridge. Bison priscus inhabited northern North America throughout the remainder of the Pleistocene. In western North America, B. priscus evolved into long-horned bison, B. latifrons, which then evolved into B. antiquus. The larger B. latifrons appears to have died out by about 20,000 ya. After the extinction of B. latifrons, B. antiquus became increasingly abundant in parts of midcontinent North America from 18,000 ya until about 10,000 ya, after which the species appears to have given rise to the living species, B. bison. B. antiquus is the most commonly recovered large mammalian herbivore from the La Brea tar pits.B. antiquus was taller, had larger bones and horns, and was 15-25% larger overall than modern bison. It reached up to 2.27 m (7.5 ft) tall, 4.6 m (15 ft) long, and a weight of 1,588 kg (3500 lb). From tip to tip, the horns of B. antiquus measured about 3 ft (nearly 1 m). [SEP] Knowledge 2: British Empire
Political boundaries drawn by the British did not always reflect homogeneous ethnicities or religions, contributing to conflicts in formerly colonised areas. The British Empire was also responsible for large migrations of peoples. Millions left the British Isles, with the founding settler populations of the United States, Canada, Australia and New Zealand coming mainly from Britain and Ireland. Tensions remain between the white settler populations of these countries and their indigenous minorities, and between white settler minorities and indigenous majorities in South Africa and Zimbabwe. Settlers in Ireland from Great Britain have left their mark in the form of divided nationalist and unionist communities in Northern Ireland. Millions of people moved to and from British colonies, with large numbers of Indians emigrating to other parts of the empire, such as Malaysia and Fiji, and Chinese people to Malaysia, Singapore and the Caribbean. The demographics of Britain itself was changed after the Second World War owing to immigration to Britain from its former colonies.
Knowledge 1: Bison antiquus
Bison antiquus, the ancient or antique bison, is an extinct species of bison that lived in North America until around 10,000 years ago (ya). It was one of the most common large herbivores on the North American continent during the late Pleistocene, and is a direct ancestor of the living American bison. [SEP] Knowledge 2: Petition to the King
Many colonists in the Americas, however, developed a different conception of their role within the British Empire. In particular, because the colonies were not directly represented in Parliament, colonists argued that Parliament had no right to levy taxes upon them. After colonists destroyed thousands of pounds of British - taxed tea during the Boston Tea Party, Parliament passed the Coercive Acts in 1774, punishing the colonies for their actions. These punitive Acts were vehemently opposed by the colonists, leading the newly formed Continental Congress to seek redress with King George III, in an attempt to reach a common understanding.

Answer: 2 million