The warblers had begun to arrive! After the birdwatcher’s yearly dry spell through summer, and with the monsoon migrants flying away, we heard a metallic che…che, followed by a dry rattle, in the Aravalli Biodiversity Park in Gurugram. The bird is fairly adaptive, adjusting to varied habitats like open country, thorny shrubs and acacias of arid scrubland, and even inhabits …