climax around 3000 BC when the climate improved considerably, giving rise to the postglacial period of warmth. The average temperature rose 3 degrees. This may not sound very much, but in the mountains the tree line rises about 100 metres up the mountainside for each degree M so the consequences were dramatic. Most of the mountains of Western Norway which today occupy about three quarters of the land mass M became covered with dense forests of pine and birch. The glaciers had thawed and vanished, and extensive oak forests, not unlike those we see today in Central Europe, spread over the low-lying land. Life was hard for the animals and plants in the high mountains, as they were pressed up towards the highest peaks, which rose like islands from a sea of forest. Along the west coast the winter is mild and snowfalls rare. Here are a number of the plants which cannot tolerate frost, for example the star hyacinth (scilla verna) and the purple heather (erica purpurea), which are otherwise only found in England, Ireland and further south. A little further inland we come upon the species which can withstand short periods of frost and snow in winter. These are found both a little further north, and in the fjords. Typical examples are the foxglove (digitalis purpurea) and the holly (ilex aquifolium), which in Norway grow only in the southwest. Animals found in Western Norway Climate Western Norway is one of the wettest regions in Europe, with precipitation in the mountains near the coast of about 3,500 mm per year on average, and exceeding 5,000 mm in peak years. In Bergen city the average precipitation is 2,250 mm per year [1]. The wet climate is partly due to the Gulf Stream, which also gives this region a milder winter than other parts of Norway, with rain being more common than snow in the winter. Summer Late June to early August is when summer is at its peak. This is when the weather is at its most stable and warmest with sunny, long and bright days. It is not unusual with temperatures reaching 25 °C (77 °F) and above. Autumn During the course of September the landscape is painted in golden colours. Red clusters of rowan berries hang on naked branches. Autumn also means harvest time along the fjords. Winter Gales, rain and cloud are likely along the west coast