Animal and plant species often migrate to us from other continents. For some of them conditions are so favourable here that they propagate rapidly and suddenly cause substantial damage: They beset or even displace the indigenous flora and fauna, damage our crops, block up pipes, make slopes collapse, bring diseases to people and animals which we are not prepared for.
In some cases, these weird conquerors have been introduced intentionally; however, many others entered our ecosystems as stowaways of global commerce. Science and public authorities are faced with species adapting very easily, multiplying at an astounding rate and not having natural enemies.
This book portrays 24 alien species of animal and plant kingdom, which cause problems in Europe and which are difficult to fight. Furthermore ways are pointed out which should be followed in order to prevent the limitless spread of the weird conquerors.