diff --git a/Module/BirdsModule/FlockingModule.cs b/Module/BirdsModule/FlockingModule.cs
index b27be40..e82925a 100644
--- a/Module/BirdsModule/FlockingModule.cs
+++ b/Module/BirdsModule/FlockingModule.cs
@@ -63,7 +63,8 @@ namespace Flocking
 		private int m_frameUpdateRate = 1;
 		private int m_chatChannel = 118;
 		private string m_birdPrim;
-		private int m_flockSize = 100;
+		private int m_flockSize = 50;
+        private int m_maxFlockSize = 100;
 		private float m_maxSpeed;
 		private float m_maxForce;
 		private float m_neighbourDistance;
@@ -107,7 +108,8 @@ namespace Flocking
             {
                 m_chatChannel = cnf.GetInt("BirdsChatChannel", 118);
                 m_birdPrim = cnf.GetString("BirdsPrim", "birdPrim");
-                m_flockSize = cnf.GetInt("BirdsFlockSize", 100);
+                m_flockSize = cnf.GetInt("BirdsFlockSize", 50);
+                m_maxFlockSize = cnf.GetInt("BirdsMaxFlockSize", 100);
                 m_maxSpeed = cnf.GetFloat("BirdsMaxSpeed", 3f);
                 m_maxForce = cnf.GetFloat("BirdsMaxForce", 0.25f);
                 m_neighbourDistance = cnf.GetFloat("BirdsNeighbourDistance", 25f);
@@ -348,7 +350,8 @@ namespace Flocking
 		{
 			if (ShouldHandleCmd ()) {
 				lock( m_sync ) {
-					int newSize = Convert.ToInt32(args[1]);
+					int newSize = Convert.ToInt32(args[1]);
+                    if (newSize > m_maxFlockSize) newSize = m_maxFlockSize;
 					m_model.Size = newSize;
                     m_log.InfoFormat("[{0}]: Bird flock size is set to {1} in region {2}.", m_name, newSize, m_scene.RegionInfo.RegionName);
 					m_view.Clear();
diff --git a/README.md b/README.md
index e694b8f..d73de75 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,8 @@ Here is an example config:
 	[Test Region 1]
 
 		BirdsEnabled = True         ;set to false to disable the module in this region	
-		BirdsFlockSize = 100        ;the number of birds to flock
+		BirdsFlockSize = 50         ;the number of birds to flock
+		BirdsMaxFlockSize = 100     ;the maximum flock size that can be created (keeps things sane)
 		BirdsMaxSpeed = 3           ;how far each bird can travel per update
 		BirdsMaxForce = 0.25        ;the maximum acceleration allowed to the current velocity of the bird
 		BirdsNeighbourDistance = 25 ;max distance for other birds to be considered in the same flock as us
@@ -42,6 +43,7 @@ Here is an example config:
 		BirdsTolerance = 5          ;how close to the edges of things can we get without being worried
 		BirdsBorderSize = 5         ;how close to the edge of a region can we get?
 		BirdsMaxHeight = 256        ;how high are we allowed to flock
+		BirdsUpdateEveryNFrames = 1 ;update bird positions every N simulator frames
 		BirdsPrim = seagull01       ;By default the module will create a flock of plain wooden spheres, 
 		                            ;however this can be overridden to the name of an existing prim that
 		                            ;needs to already exist in the scene - i.e. be rezzed in the region.