Instructions and guidelines


  • The “World Map” base used in the observation maps of the Invasive Alien Species Portal is based on the open "Openstreetmap" project.  The key of map symbols used is  here.

Presentations by the Finnish Advisory Board for Invasive Alien Species 

  • Presentations are in Finnish
  • Leave alien species behind the border - Instructions for travellers and online customers, May 2015. – Do not bring any plants home from abroad. Avoid the importation of pets. Favour domestic online shops. Proceed with caution. – Download presentation
  • A stray cat is an invasive alien species, May 2015. – Feral cats hunt native animals in the wild – Download presentation
  • Handle garden waste correctly - prevent the spread of alien species, October 2014. Alien plants spread in garden waste. What is the appropriate way to handle garden waste? Handling of aquatic plant waste. Why is it important to prevent the spread of alien species? – Download presentation
  • Instructions for garden shops on selling the seedlings of alien plant species, October 2014. Warning examples from other European countries. The importance of observation. Good product descriptions and notice boards inform about the risks of alien species. Substitute species for the replacement of invasive alien species. Cooperation with other actors. – Download presentation

Torjutaan yhdessä haitalliset vieraslajit ("Let’s combat invasive alien species together")

Do invasive alien species visit your garden?

  • How to identify and combat giant hogweeds, garden lupine, Japanese rose or Himalayan balsam in your garden? And what does the Spanish slug look like?

Download the brochure by clicking on the cover image:

Jättiputki - erittäin vaarallinen vieraslaji -esitePuutarhan vieraslajit haitalliset -esite

Guide on alien species in the Baltic Sea

The guide for identifying alien species in the Baltic Sea includes both animals and plants: molluscs, brackish water midges, zooplankton, crustaceans of the shallow littoral zone, ctenophora (jellyfish), characeae (stonewort) and vascular plants. The identification guide does not contain alien species of the groups cnidarians and bryozoa (moss animals), dinoflagellates or worms, because it is very difficult or even impossible to identify these species based on morphology. In addition to species already found in Finland, the guide includes species that are viewed as potentially spreading to Finland from other parts of the Baltic Sea, or from further afield. The guide describes 38 species in total. The guide, written in publication format, is a large file and is therefore available for browsing and downloading via this portal.   

Go to Handbook

Best practices are essential in controlling giant hogweeds, Himalayan balsam and Japanese rose

The report by the Southwest Finland Centre for Economic Development, Transport and the Environment describes experiences gained in the Centre’s operating area and locally proven best practices in preventing giant hogweeds, Himalayan balsam and Japanese rose from spreading. The report provides tools for planning the prevention of alien plant species, including in other areas, and assists in assessing the costs of the related procedures.

Prevention of alien species in south-western Finland - Best practices (in Finnish)