6057. Eurasian Tree Sparrow

  INDONESIA - 15 MAY 2023: An opportunistic Eurasian Tree Sparrow (Passer montanus) eats the leftover fruits on a plate from the breakfast of a diner who has vacated the table in the Bintan Residence hotel in Bintan Island.

 

 

 CHINA - 24 OCT 2024: 11.40am. Wildlife. An Eurasian Tree Sparrow (Passer montanus) perches on the entrance gate of the Huang Xiang Memorial in Yunmeng County. It was part of the flock present.

 SINGAPORE - 5 FEB 2024: 1.16pm. A plump Eurasian Tree Sparrow (Passer montanus) feeds on the stalk of the plumed cockscomb (Celosia argentea) grown in Gardens by the Bay. 

 

 SINGAPORE - 11 FEB 2026: 9am. The adult Eurasian tree sparrow (Passer montanus) has a rich chestnut crown and nape, a black beak and a black patch on each pure white cheek. The sexes are similarly plumaged and young birds are a duller version of the adult. 

 

 

 

 

 SINGAPORE - 27 MAY 2026: 9am. An Eurasian Tree Sparrow (Passer montanus) is spotted in Lentor Road Park. It is a small sparrow with a length of 14cm with a rich chestnut-coloured crown and nape and a prominent black patch on each white cheek. It feeds on seeds and insects. The male and female are similar.  

 

 

 

 

 

 

 11 May 2026. Juvenile Eurasian Tree Sparrow has yellow

 

 

If you are seeing a Eurasian Tree Sparrow with a bright yellow beak, it is highly likely a juvenile or fledgling. [1]

 

ig image
 

The yellow coloration serves distinct purposes during a sparrow's life cycle:

• Baby Gape (Feeding Target): Nestlings and fledglings have bright yellow corners on their beaks known as "gape flanges". This acts as a highly visible, contrasting target for parent birds to drop food into while the chick is in the nest.
• Maturation: As juvenile sparrows mature and learn to forage independently, this bright yellow pigment fades, and the beak transitions to its adult color.

Adult Beak Changes

While adults generally have black beaks, Eurasian Tree Sparrows experience beak color changes depending on the season. [1, 2]

• Summer: Their beaks typically turn a lead-blue or greyish-blue color.
• Winter: The beaks transition back to almost solid black. [1]

To confirm whether the bird you are spotting is a local juvenile or an adult undergoing seasonal color shifts, check its overall plumage. Juveniles appear fluffier, with duller colors, faded head markings, and often a pale yellow stripe behind their eyes.

 

 

 

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