Kuidas tuvastada Common Cuckoo

Common Cuckoo (Cuculus canorus) õigeks tuvastamiseks kontrolli iga neist tunnustest. Linnud võivad olla keerulised: käitumine, elupaik ja hääl kinnitavad sageli seda, mida üks foto ei suuda.

Suurus ühe pilguga

Pikkus

32-34 cm

Tiivasiruulatus

55-60 cm

Kaal

105-130 g (male), 95-115 g (female)

Kehalised tunnused, mida kontrollida

1. 1

   Sulestik

   Sulgede üldine värv ja muster.

   Adult males typically have slate-grey upperparts, head, and chest, with white underparts barred with dark grey. The tail is dark grey with white spots and a white tip. Adult females can be similar to males (grey morph) or have a rufous-brown plumage with dark barring on the upperparts and head (hepatic morph).

2. 2

   Noka kuju

   Noka kuju ja värv: võtmeline välitunnus.

   Relatively short, slightly down-curved, and stout bill; greyish-black with a yellowish base to the lower mandible.

3. 3

   Silmade värv

   Iirise värv ja silmaümbruse iseloomulikud märgid.

   Bright yellow eye-ring and iris in adults; juveniles have a duller, brownish iris and eye-ring.

4. 4

   Jalgade värv

   Jalgade ja varbade värv.

   Short, yellowish-orange legs and feet.

5. 5

   Eristavad tunnused

   Silmapaistvad tunnused, mis seda liiki eristavad.

   Long, pointed wings, long tail, and a hawk-like silhouette in flight. The grey plumage and barred underparts are characteristic. Hepatic morph females are distinctive with their rufous coloration.

6. 6

   Noorlinnu välimus

   Kuidas noored erinevad täiskasvanutest.

   Juveniles are heavily barred with dark brown on a rufous-brown or greyish-brown background, including the head and upperparts. They have a prominent white nape patch and a white throat, often with a pale yellow gape. The eye-ring is duller than adults.

7. 7

   Hooajalised muutused

   Sulgede muutused pesitsus- ja mittepesitsushooaja vahel.

   No significant seasonal plumage changes in adults. Juveniles molt into adult plumage during their first winter.

8. 8

   Sooline dimorfism

   Erinevused isaste ja emaste vahel.

   Males are generally slightly larger and heavier than females. Females exhibit two distinct plumage morphs: grey (similar to male) and hepatic (rufous-brown with barring).

Olulisemad välitunnused

• Vocalization. The male's distinctive 'cu-coo' call is the most reliable and often the first sign of its presence. Listen for the bubbling trill of the female.
• Flight Silhouette. Observe its hawk-like flight with long, pointed wings and a long tail. Note the lack of a raptor's hooked bill or broad wings.
• Plumage (Adult Male). Look for slate-grey upperparts, head, and chest, with white underparts barred with dark grey. Yellow eye-ring is a good field mark.
• Plumage (Adult Female - Hepatic Morph). Identify the rufous-brown upperparts and head, heavily barred with dark brown, and barred underparts. This morph is unmistakable.
• Plumage (Juvenile). Note the heavily barred rufous or grey-brown plumage, white nape patch, and duller eye-ring. Often seen being fed by much smaller host parents.
• Behavior. Watch for its characteristic perching posture, often on an exposed branch, and its habit of flicking its tail. Observe if it's being mobbed by smaller birds, a common reaction to cuckoos.

Uuri Common Cuckoo lähemalt