The falling out

The red-billed quelea is the world's most abundant wild bird species, with an estimated adult breeding population of 1.5 billion pairs. Some estimates of the overall population have been as large as 10 billion. The entire population is found in sub-Saharan Africa and is generally absent from deeply forested regions and the southern reaches of South Africa. It is a small passerine bird of the weaver family Ploceidae.