Why in News
  • India’s largest inland saltwater lake, Sambhar Lake (Rajasthan), has recorded a remarkable 40% increase in migratory bird arrivals this winter compared to last year.
  • The surge coincides with the highest water levels in five decades, creating ideal ecological conditions for waterbirds and flamingos.

ABOUT SAMBHAR LAKE

SAMBHAR SEES HUGE SURGE IN MIGRATORY BIRDS explained for UPSC

CURRENT OBSERVATION (WINTER 2025-26)

SAMBHAR SEES HUGE SURGE IN MIGRATORY BIRDS explained for UPSC

KEY DRIVERS OF SURGE

  • Exceptional monsoon rains (2025) replenished the lake basin.
  • High water levels (highest in 50 years) supported abundant algae, plankton, and invertebrates — rich feeding grounds for migratory birds.
  • Improved wetland ecology following reduced industrial discharge during the last season.

MIGRATION & ECOLOGICAL IMPORTANCE

SAMBHAR SEES HUGE SURGE IN MIGRATORY BIRDS explained for UPSC

CONCERNS: BIRD CASUALTIES REPORTED

  • A few bird deaths and weakness symptoms reported near Khakharki village (Nagaur district side).
  • Rescue operations initiated by the Forest and Animal Husbandry Departments.
  • Samples sent to the Central Avian Research Institute, Bareilly for testing.

Preliminary Suspicions:

  • Avian Botulism — though experts say risk is low this year due to high water levels and minimal stagnation.

WHAT IS AVIAN BOTULISM?

SAMBHAR SEES HUGE SURGE IN MIGRATORY BIRDS explained for UPSC