. Commissioners' report . - M HP tlD(^ p» ^ I I O^ boC^ eS— t. S CfT C g * .—>>a>a3a3a;cr2 3^g^£as1 7W 6c 1 I — (Do op3 I,^ a I>ja a =3uH a,C8^ o 2 «- C D 33 a c8 a — 5 a 33^ 13-a 2 ^ -M Si-03 03^ O a X e3 cS c3 £i 33 03 ID J3 ^ ^ ^ ^ I. 11 i-H C^ CO !< b^ 1^ H » H H H H O O O O 356 EXPLANATION OF TERMS USED IN DESCRIBING THE OUTER FORMS OF BIRDS A. Alulu. B. Auriculars. C. Crissum or lower tail coverts. D. Commissure. E. Culmen. F. Interscapulars. G. Iris. H. Jugulum. I. Lores. J. Mandible. K. Nape. L. Occiput. M. Orbit. N. Primary quills or primaries. \ 0. Secondary quill
. Commissioners' report . - M HP tlD(^ p» ^ I I O^ boC^ eS— t. S CfT C g * .—>>a>a3a3a;cr2 3^g^£as1 7W 6c 1 I — (Do op3 I,^ a I>ja a =3uH a,C8^ o 2 «- C D 33 a c8 a — 5 a 33^ 13-a 2 ^ -M Si-03 03^ O a X e3 cS c3 £i 33 03 ID J3 ^ ^ ^ ^ I. 11 i-H C^ CO !< b^ 1^ H » H H H H O O O O 356 EXPLANATION OF TERMS USED IN DESCRIBING THE OUTER FORMS OF BIRDS A. Alulu. B. Auriculars. C. Crissum or lower tail coverts. D. Commissure. E. Culmen. F. Interscapulars. G. Iris. H. Jugulum. I. Lores. J. Mandible. K. Nape. L. Occiput. M. Orbit. N. Primary quills or primaries. \ 0. Secondary quills or secondaries. Tertiary quills or tertiaries. \ Q. Pileum. R. Rictus. S. Lesser wing coverts. ^ T. Middle wing coverts. - Secondary coverts. U. Greater wing coverts. ) V. Primary coverts. * W. Tibia. X. Tarsus. Y. Tail feathers or Rectrices. Z. Upper tail coverts. 1. Scapulars. 2. Unguis or Claw. 3. 357 FAMILY ANATID^.—THE SWANS, GEESE AND DUCKS. Of the family Anatidae we have in Ontario a very large representation, forbirds of this group are generally most numerous in the northern portions of theearth, hence Ontario, on account of her great extent northward toward theirbreeding grounds, comes in for a large share of them. The representatives of thisfamily of birds in North America may, for convenience, be divided into threagroups, viz.:— The Cygninse, or Anserinse, or Anatinse, or Ducks. Of the sub-family Cygninge or swans there are two varieties which inhabitAmerica, the Olor Columbianus or Whistling swan, and the Olor Buccinator orTrumpeter swan. 358 OLOR COLUMBIANUS (Stejn). THE WHISTLING SWAN. Specific Character.—Tail usually of twenty feathers ; bill not longer thanthe head. Entire plumage pure white ; the head, sometimes the neck, or even theentire under parts tinged with rusty. Bill, tarsi, and feet, deep black, the bareloral skin usually marked
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