Aerial views from Camp Savute Elephant Camp by Orient Express in Botswna, in the Chobe National Park and Camp Eagle Island Camp by Orient Express Camp, outside the Moremi Game Reserve in Botswana. The Okavango River is a long African river, which rises in the plateau of Bie, Angola, in a fairly rainy, and after a journey of almost 1,000 km enters a drainage basin, and in Botswana, where he has been an extensive alluvial region improperly named and known throughout the world as the Okavango Delta. As leads to an area with a very arid climate, it is an allochthonous river, such as the Nile River in Egypt, or the Niger River in Mali. Its watershed drains an area of ??721 277 km ². The rainy season in the delta coincides with that of Angola, which takes place between October and April and in flood of the Okavango River, which begins to be felt in December and takes nine months to complete due to the low gradient of the river, about 60 m at 450 km. The rains are more abundant in the north and lower in the south, where the river goes into the Kalahari. In the town of Maun, the southern gateway to the Okavango Delta, the contrast between day and night is great in winter, with an average minimum 6 ° C and an average maximum of 23 ° C. Frosts are not uncommon during cold spells. In summer, the heat is very strong but at night is refreshing, with a minimum average of 19 ° C in November and December and average maximum of 35 ° C in October, before the rains. Humidity is maintained between 55 and 70 percent. The rains are zero in July, August and September and virtually zero in May and June, with 5 and 3 mm on average. In October, the average is 23 mm, and in November, 56 mm, in December, 86 mm, in January, the wettest month of 107 mm, in February, 71 mm, in March, 71 mm, and in April of 18 mm, then end, but the waters are still rising many times until July.