Blue-wattled Bulbul (Pycnonotus nieuwenhuisii)

The Blue-wattled Bulbul (Pycnonotus nieuwenhuisii) is a disputed songbird species in the family Pycnonotidae.

Taxa named after him include the orchid Bulbophyllum nieuwenhuisii and the Blue-wattled Bulbul (Pycnonotus nieuwenhuisii).

Birds described in 1901 include the Blue-wattled Bulbul, Cape Verde Swift, Cinnamon Frogmouth, Colima Pygmy-owl, Fearful Owl, Green-breasted Pitta and Waterfall Swift.

Blue-wattled Bulbul (Pycnonotus nieuwenhuisii)

Taxa named after him include the orchid Bulbophyllum nieuwenhuisii and the Blue-wattled Bulbul (Pycnonotus nieuwenhuisii).