Come identificare Eurasian Sparrowhawk

Per identificare correttamente Eurasian Sparrowhawk (Accipiter nisus), 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

28-38 cm (male), 35-41 cm (female)

Apertura alare

55-65 cm (male), 67-80 cm (female)

Peso

110-196 g (male), 185-342 g (female)

Caratteristiche fisiche da controllare

1. 1

   Piumaggio

   Colorazione e disegno generale del piumaggio.

   Adult males have slate-grey upperparts, often with a bluish tinge, and finely barred rufous-orange underparts. Adult females have dark grey-brown upperparts and finely barred grey-brown underparts. Both sexes have a white supercilium (eyebrow stripe) and a dark eye stripe. Juveniles are browner above with coarser, often streaky, barring below.

2. 2

   Forma del becco

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

   Short, strongly hooked, dark grey to black with a yellow cere.

3. 3

   Colore degli occhi

   Colore dell'iride e segni distintivi sugli occhi.

   Adults have bright yellow to orange-yellow eyes; juveniles have pale yellow eyes.

4. 4

   Colore delle zampe

   Colore di zampe e piedi.

   Long, slender yellow legs and feet with sharp black talons.

5. 5

   Caratteristiche distintive

   Tratti distintivi che separano questa specie.

   Short, broad, rounded wings; long, square-tipped tail with 4-5 dark bands; rapid wing beats interspersed with glides; distinctive 'flap-flap-glide' flight pattern. Females are noticeably larger than males.

6. 6

   Aspetto giovanile

   Come i giovani si differenziano dagli adulti.

   Juveniles are browner on the upperparts, often with rufous fringes to feathers. Underparts are more coarsely barred or streaked with dark brown on a creamy background. Eyes are paler yellow. The supercilium is less distinct.

7. 7

   Cambiamenti stagionali

   Variazione del piumaggio tra stagione riproduttiva e non.

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

8. 8

   Dimorfismo sessuale

   Differenze tra maschi e femmine.

   Pronounced sexual dimorphism in size and plumage. Females are up to 25% larger and twice as heavy as males. Males have more rufous-orange barring on underparts and often a bluer back. Females are browner/greyer above and have grey-brown barring below.

Segni di campo chiave

• Size and Shape. Look for a small, agile raptor with short, broad, rounded wings and a long, square-tipped tail. Females are noticeably larger than males.
• Flight Pattern. Observe its characteristic 'flap-flap-glide' flight, often low and fast through vegetation. It rarely soars for extended periods.
• Plumage (Adult Male). Slate-grey back (often bluish), finely barred rufous-orange underparts, white supercilium, yellow-orange eyes.
• Plumage (Adult Female). Dark grey-brown back, finely barred grey-brown underparts, white supercilium, yellow eyes.
• Plumage (Juvenile). Browner upperparts, coarser dark brown barring/streaking on creamy underparts, paler yellow eyes.
• Head and Eye. Distinctive white supercilium and bright yellow to orange eyes (paler in juveniles). Dark eye stripe.
• Tail. Long tail with 4-5 dark bands, often held slightly fanned in flight.

Esplora Eurasian Sparrowhawk