EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)

The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.

• M : Marine benthic habitats (MA-MG)
  
• MH : Pelagic water column
  
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
  • N1 : Coastal dunes and sandy shores
    
  • N2 : Coastal shingle
    
  • N3 : Rock cliffs, ledges and shores, including the supralittoral
    
    • N31 : Atlantic and Baltic rocky sea cliff and shore
      
    • N32 : Mediterranean and Black Sea rocky sea cliff and shore
      
    • N33 : Macaronesian rocky sea cliff and shore
      
    • N34 : Atlantic and Baltic soft sea cliff
      
    • N35 : Mediterranean and Black Sea soft sea cliff
      
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
  • U1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
  • U2 : Screes
    
    • U21 : Boreal and arctic siliceous scree and block field
      
    • U22 : Temperate high-mountain siliceous scree
      
    • U23 : Temperate, lowland to montane siliceous scree
      
    • U24 : Mediterranean siliceous scree
      
    • U25 : Boreal and arctic base-rich scree and block field
      
    • U26 : Temperate high-mountain base-rich scree and moraine
      
    • U27 : Temperate, lowland to montane base-rich scree
      
    • U28 : Western Mediterranean base-rich scree
      
    • U29 : Eastern Mediterranean base-rich scree
      
      • U291 : Eastern Mediterranean limestone screes
        
      • U292 : Eastern Mediterranean serpentine screes
        
      • U293 : Cyprian screes
        
      • U294 : Illyrian montane calcareous screes
        
      • U295 : Illyrian sub-Mediterranean screes
        
      • U296 : Illyrian montane serpentine screes
        
      • U297 : Illyrian Achnatherum calamagrostis screes
        
      • U298 : Anatolian calcareous screes
        
    • U2A : Crimean base-rich screes
      
  • U3 : Inland cliffs, rock pavements and outcrops
    
  • U4 : Snow or ice-dominated habitats
    
    • U41 : Snow pack
      
    • U42 : Ice cap and glacier
      
    • U43 : Rock glacier and unvegetated ice-dominated moraine
      
      • U431 : Rock glaciers
        
      • U432 : Ice-core moraines
        
      • U433 : Unvegetated glacial moraines in the process of formation
        
  • U5 : Miscellaneous inland habitats usually with very sparse or no vegetation
    
  • U6 : Recent volcanic features
    
    • U61 : Subarctic volcanic field
      
    • U62 : Mediterranean, Macaronesian and temperate volcanic field
      
• V : Vegetated man-made habitats
  
  • V1 : Arable land and market gardens
    
  • V2 : Cultivated areas of gardens and parks
    
  • V3 : Artificial grasslands and herb dominated habitats
    
  • V4 : Hedgerows
    
    • V41 : Hedgerows of non-native species
      
    • V42 : Highly-managed hedgerows of native species
      
    • V43 : Species-rich hedgerows of native species
      
    • V44 : Species-poor hedgerows of native species
      
  • V5 : Shrub plantations
    
  • V6 : Tree dominated man-made habitats