Heart of pink

Pulicat Lake in Tamil Nadu, India, the second-largest brackish water lagoon in the country, is a heaven for flamingos. From a bird's eye view, a colony of flamingos can be seen forming a heart-like shape as they perform their courtship dance, known as marching. The lake, which spans 750 square kilometers, also hosts rapidly growing algal populations, a key food source for these pink-winged visitors.