Nandankanan Zoological garden has many birds in enclosed aviaries. But besides that, the nearby lakes and water bodies and the forest like environment also attracts large number of free birds and many nest in those areas. Tathya has a nice article and couple of nice pictures on it. Following is Samjaja’s take on it, which Samaja attributes to Tathya. 20070813a_001101009gendalia.jpg
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ZeeNews also has a report on this. Following is an excerpt.

Visitors are happy watching storks, herons and grey cranes and many other species that have added to every one’s joy.

Ajit Kumar Patnaik, Director, Nandankanan zoo, said “Storks, herons and others birds have migrated to Nandankanan Zoo for nesting. But ninety per cent of them are open billed storks, locally called “Gendallia”.