In the late 19th century, the Hulah Valley was mostly swampland and the 15,000 acre (61 km2) shallow
Lake Hula. The region was a well-known breeding ground for mosquitoes, and as a result concerns about
malaria restricted further Jewish settlement in the region for fifty years. As drainage technology and pesticide use increased in the 1920s, settlement in the area became more feasible. After the
1948 Arab–Israeli War and the establishment of the state of Israel, the swamp was drained and converted into agricultural land. Recognizing the unique ecosystem of the valley and its importance as a stopover for migrating birds, scientists lobbied for a small portion of the swamp to remain as a nature reserve. In 1964, the 800 acre (3.2 km2) Hula Valley
Nature Reserve, the country's first, was opened. ==History==