This is a strange but entertaining entry into the Grijpstra & De Gier mystery novels (sometimes called the Amsterdam Cops series). Ostensibly investigating the murder of a much disliked pimp, our detectives are led into much deeper waters. The streetbird of the title can stand for many things-- a misplaced vulture, local prostitutes, and perhaps even something stranger than the rest.
This book succeeds remarkably well because of the way that explores not only the personality of the two title characters but also the mind of the Commissaris. He takes the role of the wiser and more balanced investigator where Grijpstra and De Gier are somehow more exaggeratedly themselves than in the other books of the series. I was less enchanted with the character and magic of Uncle Wisi. But he and his vulture and his magic do function very well to cast the web of enchantment over the city to make it into something stranger than workaday Amsterdam.
The ending is a little bit stretched, but having made it that far with interest and enjoyment, I was willing to buy it. Others may not be so tolerant.
Solid series entry-- typical van de Wetering, if such a thing exists.