diff --git a/app/api/tree.py b/app/api/tree.py
old mode 100755
new mode 100644
index 0d5b84f..1dcd698
--- a/app/api/tree.py
+++ b/app/api/tree.py
@@ -11,12 +11,10 @@
 )
 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
-from shapely.geometry import mapping
-
 route_street_tree = APIRouter(prefix='/street_tree/v1')
 
 def create_geojson_from_rows(rows: List[Dict[str, Any]]) -> FeatureCollection:
@@ -39,37 +37,42 @@ def create_geojson_from_rows(rows: List[Dict[str, Any]]) -> FeatureCollection:
     '/details',
     response_model=StreetTreeResponse,
     tags=['Strassenbaeume'],
-    description='Retrieves street tree details based on the provided tree id.'
+    description=(
+        'Retrieves street tree details based on the provided tree id.'
+    )
 )
 async def fetch_tree_by_id(
     tree_id: int,
     session: AsyncSession = Depends(get_session)
-) -> StreetTreeResponse:
-    row = await get_tree_by_id(session, tree_id)
+) -> List[StreetTreeResponse]:
+    rows = await get_tree_by_id(session, tree_id)
+    identifier = f'tree_id {tree_id}'
 
-    if not row:
+    if not rows:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
-            detail=f'No matches found for tree_id {tree_id}'
+            detail=f'No matches found for {identifier}'
         )
 
-    # `row` is a RowMapping, convert to model instance or dict if needed
-    tree: StreetTreeRegister = row[0] if isinstance(row, tuple) else row
+    return rows
+
+@route_street_tree.get(
+    '/species',
+    response_model=StreetTreeResponse,
+    tags=['Strassenbaeume'],
+    description=(
+        'Retrieves street tree details based on the provided tree id.'
+    )
+)
+async def fetch_tree_by_species(
+    session: AsyncSession = Depends(get_session)
+) -> List[StreetTreeResponse]:
+    rows = await get_tree_by_species(session)
 
-    # Convert WKBElement geom to GeoJSON dict
-    shape = to_shape(tree.geom)
-    geojson_dict = mapping(shape)
+    if not rows:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f'No matches found'
+        )
 
-    # Return tree data with geom as GeoJSON dict
-    return {
-        "id": tree.id,
-        "tree_number": tree.tree_number,
-        "street": tree.street,
-        "area_type": tree.area_type,
-        "species": tree.species,
-        "north": tree.north,
-        "east": tree.east,
-        "registration_date": tree.registration_date.isoformat() if tree.registration_date else None,
-        "type": tree.type,
-        "geom": geojson_dict,
-    }
\ No newline at end of file
+    return rows
diff --git a/app/models/tree.py b/app/models/tree.py
old mode 100755
new mode 100644
index 2f532b5..4ef84c0
--- a/app/models/tree.py
+++ b/app/models/tree.py
@@ -17,4 +17,4 @@ class StreetTreeRegister(SQLModel, table=True):
     east: float = Field(sa_column=Column(Numeric, nullable=False))
     registration_date: datetime.date = Field(sa_column=Column(Date(), nullable=False))
     type: str = Field(sa_column=Column(String, nullable=False))
-    geom: object = Field(sa_column=Column(Geometry('POINT', srid=31467), nullable=True))  # nullable depends on DB column
\ No newline at end of file
+    geom: object = Field(sa_column=Column(Geometry('POINT', srid=31467), nullable=True))  # nullable depends on DB column
diff --git a/app/schemas/tree.py b/app/schemas/tree.py
old mode 100755
new mode 100644
diff --git a/app/services/tree.py b/app/services/tree.py
old mode 100755
new mode 100644
index 6bba84b..dba5e8a
--- a/app/services/tree.py
+++ b/app/services/tree.py
@@ -1,5 +1,7 @@
+from sqlalchemy import select, case, literal_column, func
+from sqlalchemy.sql import exists, and_, not_, text
+from sqlalchemy.orm import aliased
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlmodel import select
 from app.models.tree import StreetTreeRegister
 
 async def get_tree_by_id(session: AsyncSession, tree_id: int):
@@ -10,3 +12,39 @@ 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]