March in Vedanthangal is the late-nesting tail. The painted-stork and ibis populations begin migrating north toward Bharatpur and the Gangetic plain; the cormorant and openbill numbers remain substantial (15-25,000) but flight density drops 40-50 percent from January peak. Daytime 26-32C, humidity 70 percent, dawn temperatures 22C. Dawn flight window 6-6:45am — bird departures concentrated in the first 30 minutes of light, then the open-water heat reduces visible activity. The 30-foot watchtower remains the best vantage but mid-morning visits past 8am yield diminishing returns. Forest Department typically winds down sanctuary access by late March or early April as the tank level drops and the migratory population departs — verify exact 2026 closure date with TN Forest Department (forests.tn.gov.in). The Barringtonia acutangula trees shed their nesting platforms after fledglings depart. Entry ₹35 still applies through whatever week the sanctuary remains open. Day-trip from Chennai 75km via NH-32, 2 hours off-peak. Last clean weekday windows for serious birders before the April-October closure.

Why March scores 8.0/10