[3] It is most diverse areas in terms of natural conditions in the Latvia north-east, with a distinctly hilly terrain and several small but deep lakes.

baltica), heath spotted-orchid (Dactylorhiza maculata), early marsh orchid (Dactylorhiza incarnata), fragrant orchid (Gymnadenia conopsea), Northern firmoss (Huperzia selago), broad-leaved sermountain (Laserpitium latifolium), black pea (Lathyrus niger), fen orchid (Liparis loeselii), alternate water-milfoil (Myriophyllum alterniflorum), common clubmoss (Lycopodium clavatum), stiff clubmoss (Spinulum annotinum), sandy esparcet (Onobrychis arenaria), bird's-eye primrose (Primula farinosa), suckling clover (Trifolium dubium), swamp violet (Viola uliginosa), leatherleaf rose (Rosa coriifolia),[8] soft downy rose (Rosa mollis), common butterwort (pinguicula vulgaris), tall broomrape (Orobanche elatior),[9] greater butterfly-orchid (Platanthera chlorantha), lesser butterfly-orchid (Platanthera bifolia) and early purple orchid (Orchis mascula).

One of the species of mosses and liverworts - Hamatocaulis vernicosus is protected under EU Nature directives.

[2] Protected birds are lesser spotted eagle (Clanga pomarina), European honey buzzard (Pernis apivorus), Hazel grouse (Tetrastes bonasia), corn crake (Crex crex), white-backed woodpecker (Dendrocopos leucotos), middle spotted woodpecker (Dendrocoptes medius), black woodpecker (Dryocopus martius), Eurasian three-toed woodpecker (Picoides tridactylus), grey-headed woodpecker (Picus canus), Eurasian pygmy owl (Glaucidium passerinum), Eurasian crane (Grus grus), red-backed shrike (Lanius collurio), wood lark (Lullula arborea), white stork (Ciconia ciconia) and black stork (Ciconia nigra).

Of the invertebrates beetles Dytiscus latissimus, Graphoderus bilineatus and dragonflies large white-faced darter (Leucorrhinia pectoralis), hermit beetle (Osmoderma eremita), Stenocorus meridianus, Saperda perforata, six spotted longhorn beetle (Anoplodera sexguttata),[10] Protaetia lugubris, Geyer's whorl snail (Vertigo geyeri), narrow-mouthed whorl snail (Vertigo angustior), Roman snail (Helix pomatia), two-toothed door snail (Clausilia bidentata), shining ram's-horn snail (Segmentina nitida), Lilypad whiteface (Leucorrhinia caudalis), dark whiteface (Leucorrhinia albifrons), European medicinal leech (Hirudo medicinalis), purple Emperor (Apatura iris), Eurasian white admiral (Limenitis camilla), clouded Apollo (Parnassius mnemosyne) and Old World swallowtail (Papilio machaon).