Cara mengidentifikasi Yellow-vented Bulbul

Untuk mengidentifikasi Yellow-vented Bulbul (Pycnonotus goiavier) dengan benar, periksa setiap fitur ini. Burung bisa sulit dikenali, karena perilaku, habitat, dan panggilan sering mengonfirmasi apa yang tidak bisa dilakukan satu foto.

Ukuran sekilas

Panjang

16-20 cm

Bentang sayap

25-30 cm

Berat

20-35 g

Ciri fisik untuk diperiksa

1. 1

   Bulu

   Warna dan pola bulu keseluruhan.

   The head is dark brown to blackish, often with a slightly crested appearance. The back and wings are olive-brown, contrasting with a whitish throat and breast. The most distinctive feature is the bright yellow vent (undertail coverts). The belly is whitish, sometimes with a faint streaking. The tail is dark brown with white tips on the outer feathers.

2. 2

   Bentuk paruh

   Bentuk dan warna paruh, tanda lapangan kunci.

   Slender, slightly decurved, and pointed, dark grey to black.

3. 3

   Warna mata

   Warna iris dan tanda khas di sekitar mata.

   Dark brown.

4. 4

   Warna kaki

   Warna kaki dan jari.

   Dark grey to black.

5. 5

   Ciri pembeda

   Ciri menonjol yang membedakan spesies ini.

   The bright yellow vent is the most reliable field mark. The slightly crested head and overall drab olive-brown upperparts with whitish underparts also aid in identification. The white tips on the outer tail feathers are visible in flight or when the tail is fanned.

6. 6

   Penampilan muda

   Bagaimana yang muda berbeda dari yang dewasa.

   Juveniles resemble adults but have duller plumage, with the yellow vent being less vibrant and the head often appearing less dark. The crest may be less pronounced.

7. 7

   Perubahan musiman

   Variasi bulu antara musim kawin dan tidak kawin.

   No significant seasonal plumage changes. Plumage remains consistent throughout the year.

8. 8

   Dimorfisme seksual

   Perbedaan antara jantan dan betina.

   Males and females are monomorphic, appearing identical in plumage and size.

Tanda lapangan kunci

• Yellow Vent. Look for the bright, conspicuous yellow patch under the tail. This is the most definitive field mark.
• Head Color. Note the dark brown to blackish head, often appearing slightly crested or shaggy.
• Underparts. Observe the whitish throat and belly, contrasting with the darker upperparts.
• Tail Tips. In flight or when the tail is fanned, look for white tips on the outer tail feathers.
• Vocalization. Listen for its characteristic cheerful, varied, and often rambling song, or its sharp 'chip' calls.
• Habitat. Often found in open, disturbed habitats like gardens, parks, and forest edges, rather than deep forest.

Jelajahi Yellow-vented Bulbul