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Brown-hooded Gull (Chroicocephalus maculipennis)    Gulls, Terns and Skimmers (Laridae)
Brown-hooded Gull 3824    (1 photos)
2018-01-09   Laguna Batuco, Región Metropolitana (RM), Chile

Adult. Worn hand and started head molt.


Brown-hooded Gull 3823    (3 photos)
2018-01-09   Laguna Batuco, Región Metropolitana (RM), Chile

Third calendar year. Looks like it is not in a completely adult stage, the inner primaries seeming soft-colored and perhaps some upperwing coverts as well.


Brown-hooded Gull 3822    (1 photos)
2018-01-09   Laguna Batuco, Región Metropolitano (RM), Chile

A single adult and 5 juveniles.


Brown-hooded Gull 3817    (1 photos)
2018-01-15   Humedal de Cartagena, Región Valparaiso (V), Chile

Juvenile. Typical young bird. Also two worn adults and a South American Tern.

There's a breeding colony here. I counted 250 birds. Juveniles included.



Brown-hooded Gull 3818    (2 photos)
2018-01-15   Humedal de Cartagena, Región Valparaíso (V), Chile

Juvenile. Appears so different from a juvenile black-headed with the adult-like black primaries with white tips


Brown-hooded Gull 3819    (3 photos)
2018-01-15   Humedal de Cartagena, Región Valparaíso (V), Chile

Juvenile. With two adults in first photo.


Brown-hooded Gull 3820    (2 photos)
2018-01-15   Humedal de Cartagena, Región Valparaíso (V), Chile

Juvenile. The white tips to the primaries are difficult to perceive from this flying angle, but obvious on the perched bird. Like that, there are no confusion species in the area, the young Gray-hooded showing a more 'normal' juvenile hand, all brownish. I'm not sure if the molted outer secondary is normally seen at this date.

Here with Franklin's Gulls and South American Terns.



Brown-hooded Gull 3821    (1 photos)
2018-01-15   Humedal de Cartagena, Región Valparaíso (V), Chile

Juvenile.


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