diff --git a/src/fellchensammlung/admin.py b/src/fellchensammlung/admin.py
index 827968d..c77ec07 100644
--- a/src/fellchensammlung/admin.py
+++ b/src/fellchensammlung/admin.py
@@ -8,7 +8,7 @@ from django.urls import reverse
 from django.utils.http import urlencode
 
 from .models import User, Language, Text, ReportComment, ReportAdoptionNotice, Log, Timestamp, SearchSubscription, \
-    SpeciesSpecificURL, ImportantLocation, SpeciesSpecialization
+    SpeciesSpecificURL, ImportantLocation
 
 from .models import Animal, Species, RescueOrganization, AdoptionNotice, Location, Rule, Image, ModerationAction, \
     Comment, Report, Announcement, AdoptionNoticeStatus, User, Subscriptions, Notification
@@ -100,11 +100,6 @@ class SpeciesSpecificURLInline(admin.StackedInline):
     model = SpeciesSpecificURL
 
 
-class SpeciesSpecializationInline(admin.StackedInline):
-    model = SpeciesSpecialization
-    extra = 0
-
-
 @admin.register(RescueOrganization)
 class RescueOrganizationAdmin(admin.ModelAdmin):
     search_fields = ("name", "description", "internal_comment", "location_string", "location__city")
@@ -112,7 +107,6 @@ class RescueOrganizationAdmin(admin.ModelAdmin):
     list_filter = ("allows_using_materials", "trusted", ("external_source_identifier", EmptyFieldListFilter))
 
     inlines = [
-        SpeciesSpecializationInline,
         SpeciesSpecificURLInline,
     ]
 
diff --git a/src/fellchensammlung/migrations/0056_alter_rescueorganization_options_and_more.py b/src/fellchensammlung/migrations/0056_alter_rescueorganization_options_and_more.py
new file mode 100644
index 0000000..f2781c6
--- /dev/null
+++ b/src/fellchensammlung/migrations/0056_alter_rescueorganization_options_and_more.py
@@ -0,0 +1,22 @@
+# Generated by Django 5.2.1 on 2025-07-14 05:12
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fellchensammlung', '0055_rescueorganization_ongoing_communication_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='rescueorganization',
+            options={'ordering': ['name']},
+        ),
+        migrations.AddField(
+            model_name='rescueorganization',
+            name='specializations',
+            field=models.ManyToManyField(to='fellchensammlung.species'),
+        ),
+    ]
diff --git a/src/fellchensammlung/migrations/0057_delete_speciesspecialization.py b/src/fellchensammlung/migrations/0057_delete_speciesspecialization.py
new file mode 100644
index 0000000..30c79c9
--- /dev/null
+++ b/src/fellchensammlung/migrations/0057_delete_speciesspecialization.py
@@ -0,0 +1,16 @@
+# Generated by Django 5.2.1 on 2025-07-14 05:15
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('fellchensammlung', '0056_alter_rescueorganization_options_and_more'),
+    ]
+
+    operations = [
+        migrations.DeleteModel(
+            name='SpeciesSpecialization',
+        ),
+    ]
diff --git a/src/fellchensammlung/models.py b/src/fellchensammlung/models.py
index bf08855..54e61be 100644
--- a/src/fellchensammlung/models.py
+++ b/src/fellchensammlung/models.py
@@ -123,6 +123,23 @@ class AllowUseOfMaterialsChices(models.TextChoices):
     USE_MATERIALS_NOT_ASKED = "not_asked", _("Not asked")
 
 
+class Species(models.Model):
+    """Model representing a species of animal."""
+    name = models.CharField(max_length=200, help_text=_('Name der Tierart'),
+                            verbose_name=_('Name'))
+    updated_at = models.DateTimeField(auto_now=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        """String for representing the Model object."""
+        return self.name
+
+    class Meta:
+        verbose_name = _('Tierart')
+        verbose_name_plural = _('Tierarten')
+
+
+
 class RescueOrganization(models.Model):
     name = models.CharField(max_length=200)
     trusted = models.BooleanField(default=False, verbose_name=_('Vertrauenswürdig'))
@@ -155,6 +172,8 @@ class RescueOrganization(models.Model):
                                                 help_text=_(
                                                     "Es findet gerade Kommunikation zwischen Notfellchen und der Organisation statt."))
     parent_org = models.ForeignKey("RescueOrganization", on_delete=models.PROTECT, blank=True, null=True)
+    # allows to specify if a rescue organization has a specialization for dedicated species
+    specializations = models.ManyToManyField(Species)
 
     class Meta:
         unique_together = ('external_object_identifier', 'external_source_identifier',)
@@ -297,22 +316,6 @@ class Image(models.Model):
         return f'<img src="{MEDIA_URL}/{self.image}" alt="{self.alt_text}">'
 
 
-class Species(models.Model):
-    """Model representing a species of animal."""
-    name = models.CharField(max_length=200, help_text=_('Name der Tierart'),
-                            verbose_name=_('Name'))
-    updated_at = models.DateTimeField(auto_now=True)
-    created_at = models.DateTimeField(auto_now_add=True)
-
-    def __str__(self):
-        """String for representing the Model object."""
-        return self.name
-
-    class Meta:
-        verbose_name = _('Tierart')
-        verbose_name_plural = _('Tierarten')
-
-
 class AdoptionNotice(models.Model):
     class Meta:
         permissions = [
@@ -1015,15 +1018,3 @@ class SpeciesSpecificURL(models.Model):
     rescue_organization = models.ForeignKey(RescueOrganization, on_delete=models.CASCADE,
                                             verbose_name=_("Tierschutzorganisation"))
     url = models.URLField(verbose_name=_("Tierartspezifische URL"))
-
-
-class SpeciesSpecialization(models.Model):
-    """
-    Model that allows to specify if a rescue organization has a specialization for dedicated species
-    """
-    species = models.ForeignKey(Species, on_delete=models.CASCADE, verbose_name=_("Tierart"))
-    rescue_organization = models.ForeignKey(RescueOrganization, on_delete=models.CASCADE,
-                                            verbose_name=_("Tierschutzorganisation"))
-
-    def __str__(self):
-        return f"{_('Spezialisierung')} {self.species}"