Rivière· 54 segments

Wkra

Crosses 7 administrative regions : Ciechanów, Działdowo, Mława, Nowy Dwór Mazowiecki, Płońsk +2

rivière

Total length

240km

Max discharge

32,9m³/s

Max Strahler

Segments matched

River geography7 admin regions · 0 communes

Parent watershed

hybas-2080358900566 km²

7 administrative regions crossed (GADM L2)

Żuromin
Mazowieckie · Poland
62.7 km
in this dpt
Działdowo
Warmińsko-Mazurskie · Poland
59.2 km
in this dpt
Płońsk
Mazowieckie · Poland
41.3 km
in this dpt
Mława
Mazowieckie · Poland
40.9 km
in this dpt
Nowy Dwór Mazowiecki
Mazowieckie · Poland
26.4 km
in this dpt
Ciechanów
Mazowieckie · Poland
18.2 km
in this dpt
Sierpc
Mazowieckie · Poland
0.0 km
in this dpt

16 intersecting protected areas

Warszawski
IUCN Not Assigned
Protected Landscape Area
Nadwkrzański
IUCN Not Assigned
Protected Landscape Area
Zieluńsko-Rzęgnowski
IUCN Not Assigned
Protected Landscape Area
Doliny Wkry i Mławki
IUCN Not Reported
Special Protection Area (Birds Directive)
Międzyrzecze Skrwy i Wkry
IUCN Not Assigned
Protected Landscape Area
Górznieńsko-Lidzbarski Park Krajobrazowy
IUCN V
Landscape Park
Welski Park Krajobrazowy
IUCN V
Landscape Park
Równina Raciążska
IUCN Not Assigned
Protected Landscape Area
Krysko-Joniecki
IUCN Not Assigned
Protected Landscape Area

7 more protected areassorted by area

Ostoja Lidzbarska
IUCN Not Reported
Site of Community Importance (Habitats Directive)
Doliny Górnej Wkry
IUCN Not Assigned
Protected Landscape Area
Świetliste dąbrowy i grądy w Jabłonnej
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Okolice Rybna i Lidzbarka
IUCN Not Assigned
Protected Landscape Area
Gołuska Kępa
IUCN IV
Nature Reserve
Forty Modlińskie
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Dziektarzewo
IUCN IV
Nature Reserve

1 page = 1 named river (aggregation of 54 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

31 distinct species · 43 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 13 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.

ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Wkra : 12 espèces reliées par 11 interactions GloBI sur 6 types (connectance 14.1%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.141

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)