diff --git a/data/Group1/Animal1/domain_contours/z_50.0.txt b/data/Group1/Animal1/domain_contours/z_50.0.txt
new file mode 100644
index 0000000000000000000000000000000000000000..190bfd6bc7ee6abcbdb758d3aeda75435d846afb
--- /dev/null
+++ b/data/Group1/Animal1/domain_contours/z_50.0.txt
@@ -0,0 +1,5 @@
+     0.0    0.0
+     0.0  750.0
+   500.00 500.0
+  1000.0  750.0
+  1000.0    0.0