Red-billed quelea
The red-billed quelea is a small, highly social weaver bird native to sub-Saharan Africa. It gathers in enormous flocks and breeds in dense colonies.
Murmuration: A coordinated flocking display in which many birds move together in shifting, cohesive patterns. Quelea flocks coordinate movement while flying between roosts and feeding grounds.
Agricultural pest: An organism that damages crops or competes with people for agricultural production. Queleas can consume large quantities of cereal crops, especially near harvest.
Weaverbird: A bird in the family Ploceidae, known for diverse social and nest-building behaviours. The red-billed quelea belongs to the weaverbird family.
Lake Nakuru: A lake in Kenya's Rift Valley known for abundant birdlife and surrounding national park. Queleas have formed conspicuous flocks around the lake's grasslands and wetlands.
Swarm behaviour: Collective movement by groups whose members respond to nearby individuals rather than a central controller. Quelea flocking is a conspicuous example of collective behaviour without a leader.
Aerial spraying: The application of chemicals from aircraft to control organisms across a broad area. Authorities have used aerial spraying against quelea breeding colonies.
Ploceidae: The family of passerine birds that includes weavers, bishops, and queleas. This family classification locates queleas among closely related African and Asian birds.
Quelea irruption: A sudden, large-scale increase or movement of queleas into an area, often linked to food availability. Irruptions make the species' shifting abundance and crop impacts especially apparent.
Colonial breeding: A breeding strategy in which many pairs nest close together in a shared area. Queleas breed in dense colonies, concentrating nests and parental activity.
Bird control: Methods used to reduce or redirect birds that threaten crops, infrastructure, or public health. Quelea management raises practical and ecological questions about large-scale bird control.