In the plant world, the orchid family is probably the most highly specialised. It is definitely the plant family with the greatest variation. The tropics have many spectacular, colourful varieties, while Denmark and the rest of Scandinavia have more modest versions. All the Danish orchids are protected species, and some are extremely rare. Orchids have developed to utilise many different types of insect pollination. This is probably an explanation of their incredible variety. Orchids can be used to gauge the quality of a natural area as they require such specialised living conditions.