birds bond bunch circle flock friends group hierarchy India Kentish Plovers krayker migratory birds plover Shorebirds social together Incredible India AEWA bird bird watch birding Charadrius alexandrinus karnataka Kentish Plover Mangalore Panambur Shore Birds wader azure beach beak bill blue coast curlews curved bill estuary feed forage gregarious hunt migratory Migratory Bird Numenius phaeopus ornithology Scolopacidae sea search shore Shore Bird water Whimbrel winter Wintering closeup macro migrant migrating monsoon Sterna fuscata Tannirbavi The Sooty Tern Calidris alba rest resting rocks Sanderlings splash surf tweet twitter bird-colonies breeding-place colonies color colors colour colours conservation contrast contrasting crowded dark estuarine-wetlands estuary-waters fence fenced foliage food-supply forested-wetland habitat light low-lying melaleuca-rhaphiophylla migratory-birds nesting nesting-place nests nursery paperbark-trees paperbarks reserve ripples rippling rookeries rookery roosting roosting-place slow-flowing swamp-paperbark tidal trees vegetation waterbird- habitat wetlands wildlife