In the Western access areas to Hungary life had speeded up - there are wind-mills, motorways, big cities and industrial parks all over the place. Yet, something is hiding between them. This is an enormous cone-shaped alluvial deposit with tiny villages, forests, and river branches. On one side of this region is today’s Szigetköz. Flowing out of the Alps and Carpathians the Danube River created this land delta unique in Europe. Arriving at the plain the river broke into wide branches where unparalleled fauna developed. These days the river cannot change its course as freely as it used to in the old days. The decisive change came about some twenty years ago with the diversion of the river and the building of the hydroelectric plant of Gabcikovo. Seeing the grip of the built in surroundings the question is obvious: can the fauna preserve its former abundance?