1. Vulture (probably a King Vulture) tearing at entrails of an animal, Tro-Cortesianus 42a. 2. Nuttall 69. 3. Nuttall 74. 4. Possibly a Black Vulture, Tro-Cortesianus 35b. 5. Tro-Cortesianus 26d. 6. Tro-Cortesianus 26d. 7. Dresden 3a. 8. Glyph, Copan (Maudslay, I, Pl. 16). 9. Glyph, Copan, Altar K (Maudslay, I, gl. 73). 10. Glyph, Tikal, House 9 (Maudslay, III, Pl. 79). 11. Black Vulture and snake, Dresden 36b. 12. Probably vultures, Tro-Cortesianus 100b. 13. Probably a vulture, Tro-Cortesianus 18b. 14. Same, Temple of the Tigers, Lower Chamber, Chichen Itza (Maudslay, III, Pl. 46). [Illustration: PLATE 19] PLATE 20 AVES HARPY EAGLE (_Thrasaetos harpyia_) 1. Glyph, Copan (Maudslay, I, Pl. 16, gl. 3). 2. Nuttall 53. 3. Glyph, Copan (Maudslay, I, Pl. 16, gl. 13). 4. Tro-Cortesianus 88c. 5. Part of a head-dress, Dresden 14c. 6. Peresianus 2. 7. Dresden 14b. 8. Eagle with crest feathers tipped by flints, Nuttall[TN-24] 9. Glyph, Tro-Cortesianus 107c. 10. Stone carving, Chichen Itza (Maudslay, III, Pl. 52). 11. Dresden 23c. 12. Possibly an eagle's head, Dresden 43c. 13. Possibly an eagle, Dresden 74. 14. Bologna 7. [Illustration: PLATE 20] PLATE 21 AVES YUCATAN HORNED OWL (_Bubo virginianus mayensis_) 1. Owl in flight, Stucco ornament, Palenque, Palace, House E (Maudslay, IV, Pl. 43). 2. Stone carving of owl, Yaxchilan, Stela 4 (Peabody Museum Memoirs, II, Pl. 70). 3. Owl in flight, carved in wood, Tikal, House C, lintel (Maudslay, III, Pl. 78). [Illustration: PLATE 21] PLATE 22 AVES YUCATAN HORNED OWL (_Bubo virginianus mayensis_) 1. Bologna 7. 2. As a head-dress, Tro-Cortesianus 95c. 3. Borgia 7. 4. On end of staff carried by warrior, Chichen Itza, Temple of the Tigers, Lower Chamber (Maudslay, III, Pl. 49). 5. Aubin 13. 6. Head highly conventionalized, Palenque, Temple of the Sun (Maudslay, IV, Pl. 88). 7. Screech-owl (_chiquàtli_), Aubin. [Illustration: [PLATE] 22[TN-25]] PLATE 23 AVES YUCATAN SCREECH OWL or _Moan-bird_ (_Otus choliba thompsoni_) 1. Dresden 7c. 2. Tro-Cortesianus 66a. 3. Dresden 11a. 4. As a head-dress, Tro-Cortesianus 94c. 5. As a head-dress, Dresden 18b. 6. Glyph associated with Moan-bird, Dresden 7c. 7. Same, Dresden 7c. 8. Dresden 10a. 9. Peresianus 10. 10. Peresianus 5. 11. Glyph representing head, Dresden 38c. 12. Same, Dresden 8b. 13. Same, Dresden 53b. 14. Same, Dresden 16c. 15. Glyph possibly representing Moan-bird, Dresden 38c. 16. Glyph of head, Dresden 53b. 17. Glyph associated with Moan-bird. 18. Tro-Cortesianus 73b. 19. As a head-dress, Dresden 16c. 20. As a head-dress, Tro-Cortesianus 95c. 21. Glyph associated with Moan-bird, Dresden 7c. [Illustration: PLATE 2[3][TN-26]] PLATE 24 AVES COPPERY-TAILED TROGON or QUETZAL (_Pharomacrus mocinno_)