SPECIES

Ruvu Weaver Ploceus holoxanthus Scientific name definitions

H. Dieter Oschadleus
Version: 1.0 — Published October 25, 2022

Breeding

Introduction

Ruvu Weaver breeds in small colonies; in one case the colony size was given as 15 nests in a tree (1). It is likely to be polygamous, as are closely related weavers (6). The eggs and nests have been described from photographs, but there have been no studies on the breeding biology of this species, so information on mating system, parental care, fledging, and other aspects of its breeding are not known.

Phenology

Laying dates are not certain, but adults active near their nests were photographed in January, May, and June, although the June record was considered post-breeding. Fresh eggs were photographed in March. In the range of Ruvu Weaver, there is a single main rainy season, with rain between October and April or May in the range of this weaver (11), thus the observed records fit into the rainy season.

Nest Site

Nests are placed in bushes, bamboos, or Phragmites reeds along rivers (1).

Nest

Structure and Composition

Nests are kidney-shaped with an entrance below, but no entrance tube. The nest is attached from the roof directly to reeds or twigs. The nests are less tightly woven and not as smooth on the outside as are the nests of African Golden-Weaver nests. Reed blades are probably the main nest material used for nest-building (1).

Construction Process

Males probably build the main nest structure, and females probably add the nest lining, as is normal in closely related weavers (6).

Eggs

Color and Surface Texture

Egg colors vary, as in many weaver species. Two eggs have been described, one each from different nests: one egg was light blue with very faint mottling, and the other egg was light brown, also with very faint mottling (1).

Size

Size of two eggs estimated from photographs with a 1 mm ruler: 21 x 15 mm, and 19 x 14 mm (1).

Recommended Citation

Oschadleus, H. D. (2022). Ruvu Weaver (Ploceus holoxanthus), version 1.0. In Birds of the World (S. M. Billerman and N. D. Sly, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.ruvwea1.01