Climate shift may expand ibisbill habitat in Himalayas, but human pressures threaten survival

Researchers have completed the first detailed climate-based study of the ibisbill in the North-Western Himalayas, identifying how warming temperatures will affect the elusive bird's range. Listed as least concern on the IUCN red list, the bird lives along fast-flowing high-altitude rivers with gravel bars and braided channels, using its long curved bill to feed on aquatic insects and invertebrates under stones.

Climate Factors

Scientists at SKUAST-Kashmir used species distribution modelling, supported by the Science and Engineering Research Board, to match known bird locations against climate data using multiple algorithms. The findings, published in the Journal for Nature Conservation, show that mean annual temperature is the main factor driving the bird's distribution in the Kashmir and Ladakh Himalayas. Future projections show a net growth in areas with suitable climate conditions, especially along mid-elevation river corridors.

Human Pressures

Experts caution that climate suitability does not guarantee actual survival. Human activities like extensive boulder-mining near valleys disrupt the birds, while human settlements bring crows, kites and dogs that threaten eggs and chicks. Ornithologist Asad Rahmani warns that garbage, plastic pollution and rising dog numbers could drive the bird out of the Kangan area and parts of the Sindh river.

Conservation Needs

Co-author Khursheed Ahmad notes that satellite telemetry shows the birds return to the same nesting sites each year, particularly along the Sindh river in Ganderbal. Severe sand and boulder mining in these spots threatens their reproductive success, making legal protection urgent. Because the ibisbill is a monotypic species forming its own taxonomic family, protecting it helps preserve entire riverine ecosystems.

Context

Specialist river birds like the ibisbill rely entirely on intact natural river flows and gravel beds for breeding and feeding. Human interventions such as mining, dams and urban expansion disrupt these delicate high-altitude habitats faster than climate shifts alone.