measurements
| American. |
Millimetres. |
European. |
| Bill along ridge..... |
49 |
57 |
| “ “ gape... |
64 |
75 |
| From the nostril to the point of the bill. |
36 |
41 |
| Length of lower mandible along the centre, (measuring to the feathers,). |
41 |
47 |
| Length of do. do. along the side, do. do. |
51 |
62 |
| Width of bill at commencement of feathers.. |
8 |
7½ |
| Depth of do. do. do.... |
11¼ |
12½ |
| Length of wing from flexure. |
290 |
317 |
| Length of tail to tips of lateral feathers |
136 |
149 |
| Length of tarsus..... |
25 |
28 |
| Middle toe without the claw. |
18 |
21 |
| Middle claw... |
7½ |
9 |
| Inner toe with claw... |
17 |
20 |
| Outer do. do..... |
21 |
26 |
| .l llull Thumb.... |
6½ |
8½ |