Bertram's Weaver (Ploceus bertrandi), sometimes called Bertrand's Weaver, is a species of bird in the Ploceidae family.
The Black-chinned Weaver (Ploceus nigrimentus) is a species of bird in the Ploceidae family.
The Lesser Masked Weaver (Ploceus intermedius) is a species of bird in the Ploceidae family.
The Red-billed Buffalo Weaver (Bubalornis niger) is a species of bird in the Ploceidae family.
The Ulanga Valley is also home to a number of species only found in the Valley, such as the Udzungwa colobus monkey and three species of birds, the Ulanga weaver, two undescribed species of cisticolas.
Certain members of Ploceidae, such as the Long-tailed Widowbird are well known for their elaborate sexual ornaments.