Come identificare Sparviero striato

Per identificare correttamente Sparviero striato (Accipiter striatus), 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

23-34 cm

Apertura alare

51-64 cm

Peso

82-218 g (males), 149-319 g (females)

Caratteristiche fisiche da controllare

1. 1

   Piumaggio

   Colorazione e disegno generale del piumaggio.

   Adults have slate-blue to bluish-gray upperparts, with rufous barring on the underparts. The tail is dark with 3-4 broad black bands and a narrow white tip. Juveniles are brown above with streaky brown underparts, often with a buffy wash.

2. 2

   Forma del becco

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

   Short, sharply hooked, dark gray to black with a yellow cere.

3. 3

   Colore degli occhi

   Colore dell'iride e segni distintivi sugli occhi.

   Adults have dark red to reddish-orange eyes; juveniles have yellow eyes that gradually darken with age.

4. 4

   Colore delle zampe

   Colore di zampe e piedi.

   Yellow

5. 5

   Caratteristiche distintive

   Tratti distintivi che separano questa specie.

   Small size, short rounded wings, long square-tipped tail (often notched when worn), and rapid wing beats interspersed with glides. The head appears small relative to the body.

6. 6

   Aspetto giovanile

   Come i giovani si differenziano dagli adulti.

   Juveniles have brown upperparts, often with rufous feather edges, and heavily streaked brown underparts on a white or buffy background. Their eyes are yellow. The tail banding is less distinct than in adults.

7. 7

   Cambiamenti stagionali

   Variazione del piumaggio tra stagione riproduttiva e non.

   No significant seasonal plumage changes; plumage is consistent year-round once adult plumage is attained.

8. 8

   Dimorfismo sessuale

   Differenze tra maschi e femmine.

   Females are significantly larger than males (up to 50% heavier and 25% longer), which is a pronounced dimorphism among raptors. Plumage is similar, though females may appear slightly duller in coloration.

Segni di campo chiave

• Size and Shape. Look for a very small hawk with short, rounded wings and a long, square-tipped tail. The head often appears small and barely extends beyond the wings in flight.
• Flight Pattern. Observe its characteristic 'flap-flap-glide' flight, often low to the ground or through dense vegetation. Wing beats are rapid and shallow.
• Plumage (Adult). Adults have a dark slate-blue back and rufous barring on the white underparts. The tail has dark bands and a narrow white tip. Eyes are dark red.
• Plumage (Juvenile). Juveniles are brown above with heavy brown streaking on the underparts, often with a buffy wash. Eyes are yellow.
• Tail Shape. The tail is typically square-tipped, though it can appear slightly notched when worn. This contrasts with the more rounded tail of a Cooper's Hawk.

Esplora Sparviero striato