diff --git a/public/resources/ecology/fauna/species/roc_juvenile.json b/public/resources/ecology/fauna/species/roc_juvenile.json
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+{
+  "id": "roc_juvenile",
+  "name": "Juvenile Roc",
+  "description": "Sub-adult of the legendary roc — already with a wingspan twice that of a golden eagle, but lacking the parent's continent-spanning territory. Feeds on full-grown deer, bears, and small whales it lifts from coastal shallows. Each juvenile claims a single mountain pinnacle as a perch for years before dispersing to find a mate. The bird's flight-feathers shed scale-sized sky-fragments that gleam blue against any background; mountaineers prize them as proof of high-altitude survival. Touched by the aether school's lifting current; bridges the mundane harpy_eagle T7 and the legendary roc T10.",
+  "tags": ["domain_air", "trophic_apex_predator", "tier_8"],
+  "domain": "air",
+  "trophic_level": "apex_predator",
+  "lineage": "raptors",
+  "ecology_tier": 8,
+  "magic_school_affinity": "aether",
+  "traits": [
+    "size_huge",
+    "diet_carnivore",
+    "habitat_aerial",
+    "locomotion_flying",
+    "thermal_warm_blooded",
+    "repro_k_strategy",
+    "social_solitary"
+  ],
+  "prey": [
+    "harpy_eagle",
+    "golden_eagle",
+    "brown_bear",
+    "grey_wolf",
+    "bactrian_camel"
+  ],
+  "habitat_min": 0.15,
+  "migration_range": 12,
+  "carrying_capacity": 0.05,
+  "lifecycle": {
+    "system": "mountain",
+    "stage": "young",
+    "formed_by": [
+      {
+        "source": "fledgling",
+        "mechanism": "accumulation",
+        "condition": "isolated mountain pinnacle with aether-current updraughts and large-mammal prey base"
+      }
+    ],
+    "transforms": [
+      {
+        "to": "roc",
+        "condition": "default",
+        "turns": 200,
+        "description": "Juvenile matures into adult roc upon claiming a continent-scale territory"
+      }
+    ]
+  },
+  "encyclopedia": {
+    "category": "world",
+    "entry_type": "creature",
+    "detail_route": "/climate/ecosystem/fauna",
+    "tags": ["air", "apex_predator", "fantasy"]
+  },
+  "substrate_climate": [
+    {
+      "substrate": "rock",
+      "t_band_min": 0,
+      "t_band_max": 3,
+      "p_band_min": 0,
+      "p_band_max": 3
+    }
+  ],
+  "terrain_affinity": [
+    "mountain",
+    "hills",
+    "tundra",
+    "wooded_foothills"
+  ],
+  "hp": 80,
+  "attack": 28,
+  "defense": 20,
+  "armor_type": "heavy",
+  "attack_type": "pierce",
+  "movement": 7,
+  "_derived_stats": true
+}