changed the descriptions of crow and raven so they more accurately de…

…scribe their relative sizes.

data/json/monsters/bird.json

@@ -163,7 +163,7 @@
     "id": "mon_crow",
     "type": "MONSTER",
     "name": { "str": "American crow" },
-    "description": "A fairly large, elegant black bird, famous for its distinctive call.  An intelligent bird, there is a glitter of mischief behind its eyes.",
+    "description": "Sleek and glossy feathers cover this dark bird.  Its pointed bill and more streamlined body distinguish it from the larger, stouter raven.  The call with loud caws and if captured can be taught to mimic human speech.",
     "copy-from": "mon_bird_flying_base",
     "volume": "600 ml",
     "weight": "450 g",
@@ -177,7 +177,7 @@
     "id": "mon_raven",
     "type": "MONSTER",
     "name": { "str": "raven" },
-    "description": "A small, elegant black bird, famous for its distinctive call.  A clever bird, there is a glitter of mischief behind its eyes.",
+    "description": "Slightly smaller than a chicken, this glossy black bird had a heavy bead and dark, sparkly eyes.  It emits a variety of sounds including croaks and a knocking sound.",
     "copy-from": "mon_bird_flying_base",
     "volume": "1960 ml",
     "weight": "1470 g",