diff --git a/app/src/main/java/de/apps4ics/mountainnavigation/MainActivity.java b/app/src/main/java/de/apps4ics/mountainnavigation/MainActivity.java
index 6a5e11d..af2a208 100644
--- a/app/src/main/java/de/apps4ics/mountainnavigation/MainActivity.java
+++ b/app/src/main/java/de/apps4ics/mountainnavigation/MainActivity.java
@@ -80,6 +80,7 @@
 
 import org.osmdroid.api.IMapController;
 import org.osmdroid.bonuspack.overlays.Marker;
+import org.osmdroid.bonuspack.overlays.Polygon;
 import org.osmdroid.bonuspack.overlays.Polyline;
 import org.osmdroid.tileprovider.tilesource.TileSourceFactory;
 import org.osmdroid.util.GeoPoint;
@@ -101,6 +102,7 @@
 import de.apps4ics.mountainnavigation.handlers.WeatherHandler;
 import de.apps4ics.mountainnavigation.pois.AddBiotaDialog;
 import de.apps4ics.mountainnavigation.pois.AddPoiDialog;
+import de.apps4ics.mountainnavigation.pois.Biota;
 import de.apps4ics.mountainnavigation.pois.DbGeoPoint;
 import de.apps4ics.mountainnavigation.pois.Endangered;
 import de.apps4ics.mountainnavigation.pois.Fountain;
@@ -629,31 +631,36 @@
             String title = PoiHandler.getEntries()[position];
             if(title.equals(getString(R.string.toggle_entry_biota))) {
                 List<Poi> biotas = dbHandler.getPoiByType(Types.BIOTA);
-                List<Marker> markers = poiHandler.getPoiIcons(Types.BIOTA, title);
                 for(int i=0; i<biotas.size(); i++) {
-                    Poi poi = biotas.get(i);
+                    Biota poi = (Biota) biotas.get(i);
                     final List<Endangered> items = dbHandler.getEndageredForBiota(poi.getId());
-                    for(int j=0; j<markers.size(); j++) {
-                        Marker m = markers.get(j);
-                        m.setOnMarkerClickListener(new Marker.OnMarkerClickListener() {
-                            @Override
-                            public boolean onMarkerClick(Marker marker, MapView mapView) {
-                                AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)
-                                        .setAdapter(new ShowEndangeredListAdapter(MainActivity.this, items), new DialogInterface.OnClickListener() {
-                                            @Override
-                                            public void onClick(DialogInterface dialog, int which) {
+                    List<DbGeoPoint> points = dbHandler.getGeoPointsForPoi(poi.getId(), Types.BIOTA);
+                    if(points.size() != 1) continue;
+                    DbGeoPoint dbgp = points.get(0);
+                    Polygon polygon = new Polygon(this);
+                    polygon.setPoints(Polygon.pointsAsCircle(dbgp.getGeoPoint(), poi.getRadius()));
+                    polygon.setFillColor(res.getColor(R.color.elevation_bg));
+                    polygon.setStrokeColor(res.getColor(R.color.elevation_line));
+                    polygon.setStrokeWidth(2);
+                    Marker m = PoiHandler.getMarkerFromGeoPoint(dbgp.getGeoPoint(), "", "", Types.BIOTA, res, mapView);m.setOnMarkerClickListener(new Marker.OnMarkerClickListener() {
+                        @Override
+                        public boolean onMarkerClick(Marker marker, MapView mapView) {
+                            AlertDialog dialog = new AlertDialog.Builder(MainActivity.this)
+                                    .setTitle(R.string.biota_dialog_title)
+                                    .setAdapter(new ShowEndangeredListAdapter(MainActivity.this, items), new DialogInterface.OnClickListener() {
+                                        @Override
+                                        public void onClick(DialogInterface dialog, int which) {
 
-                                            }
-                                        })
-                                        .create();
-                                dialog.show();
-                                return false;
-                            }
-                        });
-                        mapView.getOverlays().add(m);
-                    }
+                                        }
+                                    })
+                                    .create();
+                            dialog.show();
+                            return false;
+                        }
+                    });
+                    mapView.getOverlays().add(polygon);
+                    mapView.getOverlays().add(m);
                 }
-                mapView.invalidate();
             } else {
                 List<Marker> markers = poiHandler.getPoiIcons(type, title);
                 mapView.getOverlays().addAll(markers);
@@ -716,6 +723,9 @@
             case Types.LIFT:
                 pos = 9;
                 break;
+            case Types.BIOTA:
+                pos = 10;
+                break;
             default:
                 pos = 0;
                 break;
diff --git a/app/src/main/java/de/apps4ics/mountainnavigation/handlers/PoiHandler.java b/app/src/main/java/de/apps4ics/mountainnavigation/handlers/PoiHandler.java
index 4e0678c..e739c5c 100644
--- a/app/src/main/java/de/apps4ics/mountainnavigation/handlers/PoiHandler.java
+++ b/app/src/main/java/de/apps4ics/mountainnavigation/handlers/PoiHandler.java
@@ -769,6 +769,18 @@
         iconLayer[1] = bd;
         return new LayerDrawable(iconLayer);
     }
+
+    public static Marker getMarkerFromGeoPoint(GeoPoint gp, String title, String snippet, int type, Resources res, MapView mapView) {
+        Marker positionMarker = new Marker(mapView);
+        positionMarker.setInfoWindow(new ModernInfoWindow(mapView, true));
+        positionMarker.setPosition(gp);
+        positionMarker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM);
+        positionMarker.setTitle(title);
+        positionMarker.setSnippet(snippet);
+        positionMarker.setImage(res.getDrawable(PoiHandler.getEntryImgs()[MainActivity.getPos(type)], null));
+        positionMarker.setIcon(PoiHandler.createPoiMarker(type));
+        return positionMarker;
+    }
 }
 
 class UpdatePoiIconsAsyncTask extends AsyncTask<List<Poi>, Void, List<Marker>> {
@@ -828,14 +840,7 @@
                 break;
             }
 
-            Marker positionMarker = new Marker(mapView);
-            positionMarker.setInfoWindow(new ModernInfoWindow(mapView, true));
-            positionMarker.setPosition(gp);
-            positionMarker.setAnchor(Marker.ANCHOR_CENTER, Marker.ANCHOR_BOTTOM);
-            positionMarker.setTitle(titleText);
-            positionMarker.setSnippet(snippetText);
-            positionMarker.setImage(res.getDrawable(PoiHandler.getEntryImgs()[MainActivity.getPos(type)], null));
-            positionMarker.setIcon(PoiHandler.createPoiMarker(type));
+            Marker positionMarker = PoiHandler.getMarkerFromGeoPoint(gp, titleText, snippetText, type, res, mapView);
             result.add(positionMarker);
             PoiHandler.addPoiMarker(MainActivity.getPos(type), positionMarker);
         }
diff --git a/app/src/main/java/de/apps4ics/mountainnavigation/pois/DbGeoPoint.java b/app/src/main/java/de/apps4ics/mountainnavigation/pois/DbGeoPoint.java
index ccee528..019b154 100644
--- a/app/src/main/java/de/apps4ics/mountainnavigation/pois/DbGeoPoint.java
+++ b/app/src/main/java/de/apps4ics/mountainnavigation/pois/DbGeoPoint.java
@@ -152,4 +152,8 @@
     public void setLatSin(double lat_sin) {
         this.lat_sin = lat_sin;
     }
+
+    public GeoPoint getGeoPoint() {
+        return new GeoPoint(lat, lon, alt);
+    }
 }