Some examples of single-issue parties, as the name implies, are those parties that are mainly devoted to one specific issue, such as animal rights, the legalization of marijuana or the abolition of abortion. In the United States, these organizations may not be recognized as parties and considered primarily as special-interest groups. Some examples of single-issue parties outside of the U.S. are the "Animal Liberation Party" and "Gun Owners and Sporting Hunters Rights" parties of New South Wales in Australia and the "Bloc Quebecois" party in Canada.
The main reason why single-issue parties are not considered as "true" political parties in the U.S. is because they rarely have the capability of succeeding at winning an election, even at the lowest levels of government. Outside the U.S., however, single-issue parties have a much greater chance of winning seats in government, such as the Dutch "Party for the Animals," which gained two seats in Parliament in 2006. Some countries' single-issue parties will also adopt a broader platform rather than remain a strict single-issue party. The Canadian "Bloc Quebecois" and many "Green" parties are examples of single-issue parties that have broadened their platforms.