diff --git a/app/api/tree.py b/app/api/tree.py
index 0d5b84f..54ea4b3 100755
--- a/app/api/tree.py
+++ b/app/api/tree.py
@@ -3,15 +3,20 @@
 from typing import List, Dict, Any
 
 from fastapi import Depends, APIRouter, HTTPException, status
+from fastapi.encoders import jsonable_encoder
+from fastapi.responses import JSONResponse
 from geojson import Feature, FeatureCollection
 from sqlalchemy.ext.asyncio import AsyncSession
 
+
+
 from ..schemas.tree import (
     StreetTreeResponse
 )
 from ..dependencies import get_session
 from ..services.tree import (
-    get_tree_by_id
+    get_tree_by_id,
+    get_tree_by_species
 )
 
 from geoalchemy2.shape import to_shape
@@ -72,4 +77,24 @@ async def fetch_tree_by_id(
         "registration_date": tree.registration_date.isoformat() if tree.registration_date else None,
         "type": tree.type,
         "geom": geojson_dict,
-    }
\ No newline at end of file
+    }
+
+@route_street_tree.get(
+    '/species',
+    response_model=List,
+    tags=['Strassenbaeume'],
+    description='Retrieves street tree details based there species.'
+)
+async def fetch_tree_by_species(
+    session: AsyncSession = Depends(get_session)
+):
+    rows = await get_tree_by_species(session)
+    response = jsonable_encoder(rows)
+
+    try:
+        return JSONResponse(content=response)
+    except IndexError:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail='Not found'
+        )
diff --git a/app/services/tree.py b/app/services/tree.py
index 6bba84b..f8d2217 100755
--- a/app/services/tree.py
+++ b/app/services/tree.py
@@ -1,4 +1,5 @@
 from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy.sql import text
 from sqlmodel import select
 from app.models.tree import StreetTreeRegister
 
@@ -10,3 +11,39 @@ async def get_tree_by_id(session: AsyncSession, tree_id: int):
     row = result.scalars().first()
 
     return row
+
+async def get_tree_by_species(session: AsyncSession):
+    stmt = text('''
+        SELECT
+            tr.id,
+            tr.tree_number,
+            tr.street,
+            tr.species,
+            tr.type,
+            ROUND(ST_X(ST_Transform(tr.geom, 4326))::numeric, 6) AS lon,
+            ROUND(ST_Y(ST_Transform(tr.geom, 4326))::numeric, 6) AS lat,
+            CASE
+                WHEN tr.species ILIKE '%Tilia%' THEN 1
+                WHEN tr.species ILIKE '%Acer%' THEN 2
+                WHEN tr.species ILIKE '%Quercus%' THEN 3
+                WHEN tr.species ILIKE '%Fagus%' THEN 4
+                WHEN tr.species ILIKE '%Betula%' THEN 5
+                WHEN tr.species ILIKE '%Carpinus%' THEN 6
+                ELSE 0
+            END AS species_index
+        FROM flensburg.street_tree_register tr
+        WHERE tr.type = 'bestand'
+          AND NOT EXISTS (
+            SELECT 1
+            FROM flensburg.street_tree_register gef
+            WHERE gef.type = 'gefaellt'
+              AND gef.tree_number = tr.tree_number
+              AND gef.street = tr.street
+          )
+        ORDER BY tr.species
+    ''')
+
+    result = await session.execute(stmt)
+    rows = result.mappings().all()
+
+    return [dict(row) for row in rows]