Some organized chasing efforts have also begun in the Top End of the Northern Territory and in southeastern Australia, with the biggest successes in November and December. A handful of individuals are also known to be chasing in other countries, including the United Kingdom, Israel, Italy, Spain, France, Belgium, the Netherlands, Finland, Germany, Austria, Switzerland, Poland, Bulgaria, Slovenia, Hungary, the Czech Republic, Slovakia, Estonia, Argentina, South Africa, Bangladesh, and New Zealand; although many people trek to the Great Plains of North America from these and other countries around the world (especially from the UK). The number of chasers and number countries where chasers are active expanded at an accelerating pace in Europe from the 1990s–2010s.