This is Brewer’s blackbird, male species.
The Brewer’s Blackbird (Euphagus cyanocephalus) is sexually dimorphic; that is, distinct differences in appearance is shown by male and female of the species. The sexual dimorphism of the species is quite visible, in both plumage and eye colour, though they have similar body shape. Males are all black with a purplish sheen on the head and greenish sheen on the wings and upperparts. They have pale yellow eyes.
I will present the female bird in a later post.
These blackbirds inhabit fields and areas near human habitation. Many can be seen feeding on insects, grains or on food crumbs near parks and eateries.
These birds were photographed in California.