diff --git a/backend/src/app.ts b/backend/src/app.ts
index 0b8afa7..6e11a8d 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -94,6 +94,7 @@ import {
   getMembershipForUser,
   getNextWorkspaceId,
   getWorkspaceById,
+  getWorkspaceBirdCount,
   getWorkspaceTotalBirdCount,
   listOwnedWorkspacesByOwnerEmail,
   listRescueWorkspacesForAdmin,
@@ -951,6 +952,26 @@ const subscriptionAllowsWrite = (workspace: WorkspaceRow) => {
   return workspace.subscription_status === 'active' || workspace.subscription_status === 'trialing';
 };
 
+const getBillingPlanBirdLimit = (billingPlan: BillingPlan) => {
+  if (billingPlan === 'rescue_free') {
+    return null;
+  }
+
+  if (billingPlan === 'household_basic') {
+    return 4;
+  }
+
+  if (billingPlan === 'household_plus') {
+    return 10;
+  }
+
+  if (billingPlan === 'household_macaw') {
+    return 16;
+  }
+
+  return null;
+};
+
 const mapStripeSubscriptionStatus = (status: Stripe.Subscription.Status): SubscriptionStatus => {
   if (status === 'active' || status === 'trialing' || status === 'past_due' || status === 'canceled' || status === 'unpaid') {
     return status;
@@ -3118,6 +3139,23 @@ app.post('/api/birds', requireAuth, requireWriteAccess, requireWorkspaceRole(['o
   let uploadedObjectKeyToCleanup: string | null = null;
 
   try {
+    const birdLimit = getBillingPlanBirdLimit(req.auth!.workspace.billing_plan);
+
+    if (birdLimit !== null) {
+      const currentBirdCount = await getWorkspaceBirdCount(req.auth!.workspace.id);
+
+      if (currentBirdCount >= birdLimit) {
+        res.status(409).json({
+          error: 'This flock has reached the bird limit for the selected plan. Upgrade the flock subscription or memorialize a bird before adding another.',
+          code: 'billing_plan_bird_limit_reached',
+          birdLimit,
+          currentBirdCount,
+          billingPlan: req.auth!.workspace.billing_plan,
+        });
+        return;
+      }
+    }
+
     const birdId = crypto.randomUUID();
     const photoStorage = await resolveBirdPhotoStorage({
       birdId,
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index ec1a70e..23d5ce5 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1012,7 +1012,7 @@ const formatBillingPlanCapacity = (billingPlan: BillingPlan) => {
   }
 
   if (billingPlan === 'household_plus') {
-    return 'Permits 5 to 9 birds in the flock.';
+    return 'Permits 5 to 10 birds in the flock.';
   }
 
   if (billingPlan === 'household_macaw') {
@@ -1024,11 +1024,11 @@ const formatBillingPlanCapacity = (billingPlan: BillingPlan) => {
 
 const formatBillingPlanDropdownLabel = (billingPlan: HouseholdBillingPlan) => {
   if (billingPlan === 'household_basic') {
-    return 'Conure (4 birds)';
+    return 'Conure (up to 4 birds)';
   }
 
   if (billingPlan === 'household_plus') {
-    return 'Indian Ringneck (5-9 birds)';
+    return 'Indian Ringneck (5-10 birds)';
   }
 
   if (billingPlan === 'household_macaw') {
@@ -1066,7 +1066,7 @@ const formatBillingPlanBirdLimit = (billingPlan: BillingPlan) => {
   }
 
   if (billingPlan === 'household_plus') {
-    return '9';
+    return '10';
   }
 
   if (billingPlan === 'household_macaw') {
@@ -6451,8 +6451,8 @@ function App() {
                             })
                           }
                         >
-                          <option value="household_basic">Conure (4 birds)</option>
-                          <option value="household_plus">Indian Ringneck (5-9 birds)</option>
+                          <option value="household_basic">Conure (up to 4 birds)</option>
+                          <option value="household_plus">Indian Ringneck (5-10 birds)</option>
                           <option value="household_macaw">African Grey (11-16 birds)</option>
                           <option value="household_hyacinth_macaw">Hyacinth Macaw (17+)</option>
                         </select>
@@ -6590,8 +6590,8 @@ function App() {
                       })
                     }
                   >
-                    <option value="household_basic">Conure (4 birds)</option>
-                    <option value="household_plus">Indian Ringneck (5-9 birds)</option>
+                    <option value="household_basic">Conure (up to 4 birds)</option>
+                    <option value="household_plus">Indian Ringneck (5-10 birds)</option>
                     <option value="household_macaw">African Grey (11-16 birds)</option>
                     <option value="household_hyacinth_macaw">Hyacinth Macaw (17+)</option>
                   </select>