Ruisseau· 4 segments
La Coudanne
Crosses 2 administrative regions : Eure, Eure-et-Loir
Total length
13km
Max discharge
0,7m³/s
Max Strahler
2
Segments matched
4
River geography2 admin regions · 12 communes
2 administrative regions crossed (GADM L2)
- EureNormandie · France15.4 kmin this dpt
- Eure-et-LoirCentre-Val de Loire · France0.0 kmin this dpt
12 communes (L5)For countries with L5
- Illiers-l'Évêque6.62 km
- Louye3.85 km
- Saint-Georges-Motel2.47 km
- Courdemanche1.75 km
- Marcilly-sur-Eure0.49 km
- Muzy0.17 km
- Mesnil-sur-l'Estrée0.00 km
- Montreuil0.00 km
- Marcilly-la-Campagne0.00 km
- Dreux0.00 km
- Coudres0.00 km
- Lignerolles0.00 km
1 intersecting protected areas
Vallée de l'Eure de Maintenon à Anet et vallons affluents
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 page = 1 named river (aggregation of 4 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
686 distinct species · 2 775 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 58 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).
Indicateurs du tissu écologique
Tissu écologique de La Coudanne : 23 espèces reliées par 201 interactions GloBI sur 6 types (connectance 9.4%, filtre Serrano α=0.2). 43 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
13km
Max discharge
0,7m³/s
Max Strahler
2
Segments matched
4
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.