           ]
 
           subjects: [
-            # For development only!
-            new Subject
-              location:
-                standard: 'examples/images/bat-feeding-buzz.jpg'
-                mp3: 'examples/audio/bat-feeding-buzz.mp3'
-              coords: [0, 0]
-              metadata: {}
+            # new Subject
+            #   id: '5068c62054558f05df000001'
+            #   location:
+            #     standard: 'examples/images/bat-feeding-buzz.jpg'
+            #     mp3: 'examples/audio/bat-feeding-buzz.mp3'
+            #   coords: [0, 0]
+            #   metadata: {}
 
             # new Subject
+            #   id: '5068c62254558f05df000002'
             #   location:
             #     standard: 'examples/images/bat-searching-horizontal-hockey-stick.jpg'
             #     mp3: 'examples/audio/bat-searching-horizontal-hockey-stick.mp3'

            #   metadata: {}

            # new Subject
            #   location:
            #     standard: 'examples/images/bat-searching-plateau.jpg'
            #     mp3: 'examples/audio/bat-searching-plateau.mp3'

            #   metadata: {}

            # new Subject
            #   id: '5068c62354558f05df000004'
            #   location:
            #     standard: 'examples/images/bat-searching-vertical-hockey-stick.jpg'
            #     mp3: 'examples/audio/bat-searching-vertical-hockey-stick.mp3'
