ORDER STRIGES (OWLS)
Head large, feathered; eyes large, dilated and projecting, each surrounded by a concave disc formed of stiff diverging feathers, concealing the cere and nostrils; ears large, and of elaborate construction; plumage lax and downy, adapted for slow and quiet flight; outer toe reversible; tibia more than double the length of tarsus. Food, small quadrupeds, birds, and insects.
FAMILY STRIGIDae
_SUB-FAMILY STRIGINae_
Bill somewhat elongated, bending at the tip only; head-tufts wanting nostrils oval, oblique; facial disc large and complete; ears large, covered by an operculum; wings long, the second primary longest; tarsi long, feathered to the toes, which are strangely furnished with hair-like feathers; claws long, the middle one serrated beneath.
58. STRIX (White Owl). Characters given above. _Page 142_
_SUB-FAMILY SYRNIINae_
Bill bending from the base; tufts more or less conspicuous or wanting; facial disc complete; ears large, covered by an operculum; legs feathered to the claws.
59. ASIO (Eared Owls). Nostrils oval, oblique; tufts more or less elongated; wings long, second primary the longest. _Page 144_
60. SYRNIUM (Tawny Owl). Nostrils round; egrets wanting; wings short and rounded; fourth primary longest. _Page 146_
ORDER ACCIPITRES (EAGLES, HAWKS, ETC.)
Bill short, strong, stout at base, culmen strongly curved. Feet strong, armed with powerful talons which are capable of being bent under the feet, inner one stronger and more curved than others. Outer toe usually not reversible.
FAMILY FALCONIDae
Head covered with feathers, though sides of face are more or less bare.
_SUB-FAMILY BUTEONINae_
Bill rather small and weak, bending from the base; cutting edge of the upper mandible nearly straight, or but slightly festooned; cere large; nostrils oval; wings long; the first four feathers deeply notched on their inner webs; tail not forked. Hinder aspect of tarsus scutellate.
61. CIRCUS (Harriers). Head surrounded by a circle of feathers; tarsi, long and slender, feathered a little below the joint; wings long third and fourth primaries the longest; tail long, somewhat rounded.
_Page 147_
62. BUTEO (Buzzard). Lore without feathers; tarsi short and strong, naked or feathered; wings large, the fourth primary the longest.
_Page 150_
63. PERNIS (Honey Buzzard). Lore with feathers; tarsi short and strong, naked or feathered; wings large, the fourth primary the longest. _Page 151_
_SUB-FAMILY AQUILINae_
Bill stout, convex or slightly angular above, straight at the base, much hooked at the tip, commissure simply festooned; cere bristly; nostrils rounded or oval; wings long. Hinder aspect of tarsus reticulate.
64. AQUILA (Eagles). Upper mandible with the cutting edge nearly straight; tarsi feathered to the toes; claws unequal, grooved beneath; wings with the fourth primary longest. _Page 152_
65. HALIAeTUS (Sea-eagle). Bill very long; edges of the upper mandible slightly prominent near the hook; tarsi half-feathered; claws unequal, grooved beneath; wings with the fourth primary longest; nostrils transverse, with bony margin all round. _Page 153_
66. PANDiON (Osprey). Bill short, cutting edges of the upper mandible nearly straight; tarsi naked; outer toe reversible; claws equal, rounded beneath; wings with the second primary longest. _Page 154_
_SUB-FAMILY ACCIPITRINae_ (LONG-LEGGED HAWKS)
Bill short, strong, curved from the base; edge of the upper mandible with a prominent festoon beyond the middle; nostrils oval; wings rounded, short, reaching only to the middle of the tail; middle toe much the longest.
67. ACCiPITER (Sparrow-hawk). Tarsi long and slender; fourth and fifth primaries equal in length and the longest. Ridge of bill measured from margin of cere is less than half middle toe (without claw).
_Page 156_
_SUB-FAMILY MILVINae_
Bill of moderate length, slightly curved from the base, upper mandible with a slight festoon; nostrils oval, oblique; wings long; tail long and forked.
68. MILVUS (Kites). Tarsi feathered a little below the knee; fourth primary the longest. _Page 158_
_SUB-FAMILY FALCONINae_
Bill short, strong, curved from the base, upper mandible strongly toothed, lower notched; nostrils round; tarsi strong and short; hinder aspect reticulate; wings long and pointed, with the second primary longest, the first and third equal in length and having the inner web notched near the extremity.
69. FALCO (Falcons, Merlin, Hobby and Kestrel). Characters given above. _Page 159_
ORDER STEGANOPODES
Hind toe articulated on the inner surface of the tarsus, united to other toes by a web.
FAMILY PELECANIDae
Bill strong, edges of the mandibles minutely toothed; wings long; legs short; toes four, all connected by a membrane.
70. PHALACRoCORAX (Cormorant). Bill straight, longer than the head, compressed; upper mandible much hooked at the point; face and throat naked; inner edge of the middle claw serrated; tail rounded, rigid.
_Page 165_