Come identificare Northern Goshawk

Per identificare correttamente Northern Goshawk (Accipiter gentilis), controlla ciascuna di queste caratteristiche. Gli uccelli possono essere complicati da riconoscere, perché comportamento, habitat e canto spesso confermano ciò che una sola foto non può.

Dimensioni a colpo d'occhio

Lunghezza

46-63 cm (18-25 in)

Apertura alare

89-122 cm (35-48 in)

Peso

Males: 500-1100 g (1.1-2.4 lbs), Females: 800-1600 g (1.8-3.5 lbs)

Caratteristiche fisiche da controllare

1. 1

   Piumaggio

   Colorazione e disegno generale del piumaggio.

   Adults have dark slate-grey to brownish-grey upperparts, with finely barred white underparts. The barring is typically dense and wavy. They have a prominent white supercilium (eyebrow stripe) that extends behind the eye, and a dark cap. Juveniles are brown above with streaked underparts, often with a buffy wash.

2. 2

   Forma del becco

   Forma e colore del becco, un segno di campo chiave.

   Strong, hooked beak, dark grey to black with a yellow cere.

3. 3

   Colore degli occhi

   Colore dell'iride e segni distintivi sugli occhi.

   Adults have bright orange to deep red eyes, becoming more intense with age. Juveniles have yellow eyes.

4. 4

   Colore delle zampe

   Colore di zampe e piedi.

   Yellow

5. 5

   Caratteristiche distintive

   Tratti distintivi che separano questa specie.

   Broad, rounded wings and a relatively long tail, often appearing square-tipped or slightly notched. The flight profile shows a distinctive 'S' curve to the trailing edge of the wing. Powerful build and fierce expression.

6. 6

   Aspetto giovanile

   Come i giovani si differenziano dagli adulti.

   Juveniles are distinctly different from adults. They have brown upperparts with buffy feather edgings, and creamy-white underparts heavily streaked with dark brown. Their eyes are yellow, gradually changing to orange/red over 2-3 years.

7. 7

   Cambiamenti stagionali

   Variazione del piumaggio tra stagione riproduttiva e non.

   No significant seasonal plumage changes. Plumage becomes more worn and faded towards the end of the breeding season before molting.

8. 8

   Dimorfismo sessuale

   Differenze tra maschi e femmine.

   Females are significantly larger and heavier than males (reverse sexual dimorphism), often by 25-50% in weight and 10-15% in length and wingspan. Plumage is similar, though females may appear slightly browner on the back.

Segni di campo chiave

• Size and Build. Look for a large, powerful accipiter. Females are notably larger than males. Its robust build and broad wings are key.
• Plumage (Adult). Dark grey back, finely barred white underparts, and a striking white supercilium. Red eyes are a strong indicator in adults.
• Plumage (Juvenile). Brown back, heavily streaked brown on buffy-white underparts, and yellow eyes. The streaking is coarser than in juvenile sparrowhawks.
• Tail Shape. Relatively long tail, often appearing square-tipped or slightly notched at the end, unlike the rounded tail of Cooper's Hawk.
• Flight Style. Powerful, direct flight with rapid wing beats and glides. Agile maneuvering through dense forest. When soaring, wings are held flat or slightly bowed.
• Vocalization. Listen for the characteristic rapid 'kek-kek-kek' call, especially near nesting sites.

Esplora Northern Goshawk