カンムリオオタカ 対 アカハラダカ

The most reliable field mark between Crested Goshawk and Chinese Sparrowhawk is the presence of a short, distinct crest on the Crested Goshawk, which is never shown by the Chinese Sparrowhawk. For immatures, focus on underpart streaking and wing pattern: Crested Goshawk juveniles have buffy underparts with rufous streaks and bars, while Chinese Sparrowhawk juveniles show more grey in the face and brown above, with streaked underparts and barred thighs. In flight, look for the black wing tips on adult Chinese Sparrowhawks, which are lacking in Crested Goshawk. The Goshawk is also notably bulkier, with broader wings and a longer tail, especially in females. Both species can be confused in perched or soaring views, but careful attention to structure and head pattern will resolve most cases.

1. **Crested Goshawk always shows a short, bushy crest on the head, visible in profile when perched or alert. Chinese Sparrowhawk never shows a crest. This is the single most reliable mark in all ages and sexes.
2. **Adult Chinese Sparrowhawk has prominent black wing tips, especially visible in flight. Crested Goshawk lacks this feature entirely. This mark is most useful on adult males, but some females show it too.
3. **Juvenile Crested Goshawk has buffy underparts with rufous streaks and bars, and pale fringes on head feathers. Juvenile Chinese Sparrowhawk shows a grey face, brown upperparts, and underparts that are streaked (not barred) with barred thighs. Use these underpart differences for immatures.
4. **Adult male Crested Goshawk has a dark brown crown, grey head sides, and bold black moustachial and throat stripes. Chinese Sparrowhawk males are plainer-headed, with a uniform grey above and no strong facial pattern.
5. **Female Crested Goshawk is much larger and bulkier than female Chinese Sparrowhawk, with a browner head and brown streaks/bars below. Female Chinese Sparrowhawk is smaller, with rufous on the breast and underwing coverts, and yellow eyes.
6. **Eye color can help: adult male Chinese Sparrowhawk has red eyes, female and juvenile have yellow eyes. Crested Goshawk eye color is less distinctive for separation.
7. **Tail and wing shape: Crested Goshawk has a longer tail and broader wings, giving a bulkier, more powerful impression in flight or perched. Chinese Sparrowhawk is slimmer, with shorter tail and more pointed wings.
8. **Flight style: Crested Goshawk uses slow, deliberate flaps and glides, looking heavy and maneuverable. Chinese Sparrowhawk is lighter and more buoyant in flight.
9. **Head pattern: Only Crested Goshawk has bold black moustachial and throat stripes (males), while Chinese Sparrowhawk has a plain face (except for the grey face in juveniles).
10. **Underwing coverts: Female Chinese Sparrowhawk shows rufous on underwing coverts, which is lacking in Crested Goshawk.
11. **Juvenile upperwing pattern: Chinese Sparrowhawk juveniles have streaked underwing coverts and less prominent black wing tips; Crested Goshawk juveniles lack these features.
12. **Perched posture: Crested Goshawk often appears upright and powerful, with a thick neck and obvious crest. Chinese Sparrowhawk is slimmer and more delicate in posture.
13. **Habitat context: Deep forest, especially with a large, crested raptor, favors Crested Goshawk. Open woodland or edge, especially with a slim, short-tailed bird, favors Chinese Sparrowhawk.
14. **Size in direct comparison: If seen together, Crested Goshawk is always the larger, bulkier bird.
15. **When in doubt, prioritize the crest (present only in Goshawk) and black wing tips (present only in adult Sparrowhawk) as your first checks, then move to underpart pattern and structure for confirmation."

Crested Goshawk is generally larger, ranging from 30–46 cm in length, with females much bigger than males. Chinese Sparrowhawk is smaller, at 30–36 cm, though females are still larger than males. The Goshawk has a noticeably bulkier build, broader wings, and a longer tail, which is especially apparent in flight or when perched side-by-side. This size difference is most obvious when comparing adult females, but even males of the Goshawk tend to look more robust than any Chinese Sparrowhawk.

• Juveniles/Immatures: Crested Goshawk juveniles have a buff background to the underparts with rufous streaks on the breast and bars on the belly, plus pale fringes to head feathers. Chinese Sparrowhawk juveniles have a grey face, brown upperparts, yellow eyes, and streaked underparts with barred thighs. Their underwing coverts are streaked, but the black wing tips are less prominent than in adults.
• Adult males: Crested Goshawk males show a dark brown crown, grey head sides, black moustachial and throat stripes, and pale underparts with rufous streaks and bars. Chinese Sparrowhawk males are grey above, white below, with red eyes and prominent black wing tips.
• Adult females: Female Crested Goshawks are larger, with browner heads and brownish underpart streaks/bars. Female Chinese Sparrowhawks have rufous on the breast and underwing coverts, yellow eyes, and lack the Goshawk's crest.
• Key contrasts: Only Crested Goshawk shows a short crest (all ages/sexes). Only Chinese Sparrowhawk has black wing tips (adults, especially males). Underpart patterning is more streaked and barred in Goshawk, more cleanly streaked with barred thighs in Sparrowhawk.

Crested Goshawk typically flies with slow, deliberate flaps and straight glides, a style similar to other forest Accipiters. Its short, broad wings and long tail are adapted for maneuvering through dense trees. Chinese Sparrowhawk is also agile but appears lighter and more buoyant in flight, with less bulk and a more pointed wing shape. Both species can perch quietly in forest edges or open woodland, but the Goshawk often appears more upright and powerful, while the Sparrowhawk is slimmer and more delicate.

Both species occur in wooded habitats, but Crested Goshawk is more strongly associated with dense forests and mature woodland, where its structure and flight style are advantageous. Chinese Sparrowhawk is more likely to be seen in open woodland, forest edges, or even plantations, and is a regular migrant in some areas. Overlap is possible, but context can help: a large, crested raptor deep in forest is more likely a Goshawk; a slimmer, short-tailed bird at a forest edge or in migration is more likely a Sparrowhawk.