カタジロフウキンチョウ 対 ズキンフウキンチョウ

The most reliable field mark between White-banded Tanager and Hooded Tanager is the striking difference in head pattern: adult Hooded Tanager males have a jet-black hood with white lores and throat, while White-banded Tanager shows a shrike-like, more uniform pattern without such a hood. Females and immatures of Hooded Tanager lack the black hood but still differ in head and underpart tones. White-banded Tanager is notably larger and heavier-bodied, often seen in cohesive groups, while Hooded Tanager is smaller and more delicate. Juvenile and helper White-banded Tanagers can show brownish tones, which may cause confusion with immature Hooded Tanagers, but careful attention to head pattern and size will resolve most field encounters.

1. Head pattern is key: Adult male Hooded Tanagers have a solid black hood with white lores and throat—no other tanager in this comparison shows this pattern. If you see a black-headed bird with white face patches, it's Hooded Tanager (male).
2. Female and immature head color: Female Hooded Tanagers lack the black hood but have a grayish blue head matching the upperparts; White-banded Tanager of any age never shows this uniform blue-gray head.
3. Juvenile confusion: Juvenile White-banded Tanagers (helpers) show brownish tones in the gray areas, sometimes misidentified as females. Hooded Tanager juveniles are pale blue above and bluish gray below, with rose-orange legs—look for these leg and underpart colors to separate.
4. Underpart tones: White-banded Tanager has a more uniform, shrike-like gray and white pattern. Hooded Tanager females and immatures have a buff tinge to the white underparts, especially on the throat and breast.
5. Bill color: Hooded Tanager males have a black bill; females have a black upper mandible and pale lower mandible. White-banded Tanager's bill is not described as distinctive, so use this mark with caution.
6. Leg color: Hooded Tanager (especially juveniles) has yellow or yellow-brown (adults) or rose-orange (juveniles) legs and feet. White-banded Tanager's leg color is not described as diagnostic.
7. Size and structure: White-banded Tanager is much larger and heavier-bodied than Hooded Tanager. If the bird looks notably stocky and long, suspect White-banded.
8. Group size and behavior: White-banded Tanager is often in tight groups of 7 or more, sometimes with brownish helpers. Hooded Tanager is less likely to be in such large, cohesive groups.
9. Sexual dimorphism: White-banded Tanager shows no sexual dimorphism—males and females look alike. Hooded Tanager is sexually dimorphic, with males showing the black hood.
10. Plumage consistency: White-banded Tanager's plumage is consistent across sexes and ages (except for brownish juveniles/helpers), while Hooded Tanager varies by sex and age.
11. Upperwing pattern: No distinctive upperwing or flight pattern marks are described for either species in these notes—do not rely on wing panels or trailing edges.
12. Habitat overlap: Both species may occur in similar habitats, so do not rely on habitat alone for separation unless you have strong local knowledge.
13. Vocalizations: Not described in these notes—do not use voice as a separator here.
14. Seasonal context: White-banded Tanager breeds in October–November; Hooded Tanager's breeding season varies by region. Presence of helpers in White-banded Tanager groups may indicate breeding season.
15. Pitfalls: Beware of brownish juvenile White-banded Tanagers and female Hooded Tanagers—always check head pattern, underpart tone, and size before concluding.

White-banded Tanager is substantially larger and heavier (16 cm, 29–32 g) than Hooded Tanager (12–13.5 cm, 12–21 g) [wikipedia][wikidata]. In the field, White-banded Tanager will appear bulkier and longer-bodied, with a more robust jizz, while Hooded Tanager is noticeably smaller and lighter. This size difference is often apparent even at a distance, especially when both species are seen in the same habitat.

• Juveniles and immatures: White-banded Tanager helpers (recent fledglings) have brownish areas replacing the adult's gray, which can be mistaken for a duller tanager. Hooded Tanager juveniles are pale blue above and bluish gray below, with rose-orange legs and feet—look for these leg colors and overall blue-gray wash to separate from brownish White-banded.
• Adult males: Hooded Tanager males are instantly separated by their solid black hood, contrasting sharply with white lores, throat, and sides of neck, and grayish blue upperparts. White-banded Tanager lacks any black hood or mask; its plumage is shrike-like, with gray and white but no sharply defined black head.
• Adult females: Female Hooded Tanager lacks the black hood but has a uniform grayish blue head and upperparts, with a buff tinge on the white underparts (especially throat and breast). White-banded Tanager females are identical to males, so no sexual dimorphism is present—look for the consistent shrike-like pattern.
• Bill and bare parts: Hooded Tanager males have a black bill, females a two-toned bill (black above, pale below); both sexes have yellow or yellow-brown legs and feet, while White-banded Tanager's bill and legs are not described as distinctive in these notes.

White-banded Tanager is typically seen in pairs or small, tight-knit groups (up to 12, average 7), often with cooperative helpers from previous broods [wikipedia]. This social structure can be a clue in the field. Hooded Tanager's social behavior is less described here, but it is not noted for such large, cohesive groups. Both species forage for insects, but White-banded Tanager's tendency to move as a group is a useful behavioral cue.

Hooded Tanager is widespread across mainland South America except Chile, Ecuador, and Uruguay, and is found in a variety of habitats [wikipedia]. White-banded Tanager's range and habitat are not detailed in these notes, so habitat is not a strong separator unless local knowledge is applied.