diff --git a/specification/src/main/java/com/iluwatar/ColorSelector.java b/specification/src/main/java/com/iluwatar/ColorSelector.java
new file mode 100644
index 000000000..bc4b05f96
--- /dev/null
+++ b/specification/src/main/java/com/iluwatar/ColorSelector.java
@@ -0,0 +1,17 @@
+package com.iluwatar;
+
+import java.util.function.Predicate;
+
+public class ColorSelector implements Predicate<Creature> {
+
+	private final Color c;
+
+	public ColorSelector(Color c) {
+		this.c = c;
+	}
+	
+	@Override
+	public boolean test(Creature t) {
+		return t.getColor().equals(c);
+	}
+}
diff --git a/specification/src/main/java/com/iluwatar/MovementSelector.java b/specification/src/main/java/com/iluwatar/MovementSelector.java
new file mode 100644
index 000000000..8ad000fa2
--- /dev/null
+++ b/specification/src/main/java/com/iluwatar/MovementSelector.java
@@ -0,0 +1,17 @@
+package com.iluwatar;
+
+import java.util.function.Predicate;
+
+public class MovementSelector implements Predicate<Creature> {
+	
+	private final Movement m;
+
+	public MovementSelector(Movement m) {
+		this.m = m;
+	}
+
+	@Override
+	public boolean test(Creature t) {
+		return t.getMovement().equals(m);
+	}
+}
diff --git a/specification/src/main/java/com/iluwatar/SizeSelector.java b/specification/src/main/java/com/iluwatar/SizeSelector.java
new file mode 100644
index 000000000..82e5509ac
--- /dev/null
+++ b/specification/src/main/java/com/iluwatar/SizeSelector.java
@@ -0,0 +1,17 @@
+package com.iluwatar;
+
+import java.util.function.Predicate;
+
+public class SizeSelector implements Predicate<Creature> {
+
+	private final Size s;
+
+	public SizeSelector(Size s) {
+		this.s = s;
+	}
+	
+	@Override
+	public boolean test(Creature t) {
+		return t.getSize().equals(s);
+	}
+}