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Variation of Birds in a State of Nature by Frank Russell, 1892

Variation of Birds in a State of Nature by Frank Russell, 1892, Page 14

[?page?] 12

[chart: possibly containing a few computation errors?]

[               ][ ?illegible? ][      No.     ][ ?Len? ][      No.     ][ Aver.  ][ Var. ][   %   ]
[ Length   ][        8        ][ ?42?male ][  10.5  ][ 19female ][   9.25 ][  2.5  ][ 27% ]
[ Extent.   ][      13.       ][       29      ][   15.6  ][  33 male  ][ 14.3   ][  2.6  ][ 18% ]
[  Wing.    ][        3.8     ][ 60female ][     4.7  ][ 21female ][   4.25 ][    .9  ][ 21% ]
[   Tail.     ][        1.8     ][  45 male  ][     3.    ][ 34female ][   2.4   ][  1.2  ][ 66% ] ?50%?
[ Tarsus   ][        1.       ][       --       ][     1.3  ][        --       ][   1.15 ][    .3  ][ 26% ]
[ M. Tar.? ][      1.       ][       --       ][     1.2  ][        --       ][  1.1    ][    .2  ][ 18% ]
[ H. Tar.? ][        .3     ][       --       ][       .4  ][        --       ][     .35 ][    .1  ][ 29% ]
[ Length   ][          .5     ][       --       ][       .6  ][        --       ][     .55 ][    .1  ][ 18% ]
[ Length   ][          .3     ][       --       ][       .4  ][        --       ][     .35 ][    .1  ][ 48    ] ?29%?

Length.
Wing. Tail.
Tarsus. Middle [?Tar?].
H. [?Tar?]. L. of Culmen.
W. of Culmen.

Note the constancy of the wing in both of the above schemes. The plotting paper diagrams showing the relative variation of parts shows an increase in length of none of the parts, as the length increases except the tail and, to a slight extent, the wing. The lack of correlation of parts in many cases is striking, and quite apparent in [?thudia?] altho the birds are small.

In general there is a correlation between the length of wing and tail in but seven of the thirty specimens. The tarsus and middle [?tar?] vary little and that together. The culmen varies with the ts. in but four cases. The hind [?tar?] varies with the tarsus in but three cases. The wing varies most in the smallest birds, the tail, in the largest.

The species shows a greater uniformity throughout than N. nyctia., in progressing from the smallest to the largest. The correlation between the tarsus and the foot is more marked.

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[?page?] 12 [chart: possibly containing a few computation errors?] [ ][ ?illegible? ][ No. ][ ?Len? ][ No. ][ Aver. ][ Var. ][ % ] [ Length ][ 8 ][ ?42?male ][ 10.5 ][ 19female ][ 9.25 ][ 2.5 ][ 27% ] [ Extent. ][ 13. ][ 29 ][ 15.6 ][ 33 male ][ 14.3 ][ 2.6 ][ 18% ] [ Wing. ][ 3.8 ][ 60female ][ 4.7 ][ 21female ][ 4.25 ][ .9 ][ 21% ] [ Tail. ][ 1.8 ][ 45 male ][ 3. ][ 34female ][ 2.4 ][ 1.2 ][ 66% ] ?50%? [ Tarsus ][ 1. ][ -- ][ 1.3 ][ -- ][ 1.15 ][ .3 ][ 26% ] [ M. Tar.? ][ 1. ][ -- ][ 1.2 ][ -- ][ 1.1 ][ .2 ][ 18% ] [ H. Tar.? ][ .3 ][ -- ][ .4 ][ -- ][ .35 ][ .1 ][ 29% ] [ Length ][ .5 ][ -- ][ .6 ][ -- ][ .55 ][ .1 ][ 18% ] [ Length ][ .3 ][ -- ][ .4 ][ -- ][ .35 ][ .1 ][ 48 ] ?29%? Length. Wing. Tail. Tarsus. Middle [?Tar?]. H. [?Tar?]. L. of Culmen. W. of Culmen. Note the constancy of the wing in both of the above schemes. The plotting paper diagrams showing the relative variation of parts shows an increase in length of none of the parts, as the length increases except the tail and, to a slight extent, the wing. The lack of correlation of parts in many cases is striking, and quite apparent in [?thudia?] altho the birds are small. In general there is a correlation between the length of wing and tail in but seven of the thirty specimens. The tarsus and middle [?tar?] vary little and that together. The culmen varies with the ts. in but four cases. The hind [?tar?] varies with the tarsus in but three cases. The wing varies most in the smallest birds, the tail, in the largest. The species shows a greater uniformity throughout than N. nyctia., in progressing from the smallest to the largest. The correlation between the tarsus and the foot is more marked.