Migratory birds from far-off places have started arriving at the world famous Chilika Lake in Orissa, a fortnight after their usual arrival time. Divisional Forest Officer of Chilika wildlife division, B P Acharya said the first batch of migratory birds have been seen wandering near the lake in the Nalabana Bird Sanctuary. The DFO said their arrival was, delayed compared to the previous years, because the water levels are high in the blue lagoon of the Nalabana.Wildlife scientist Sudhakar Kar explained, the delay could also be because of the stopovers they had to make on way to Chilika on account of bad weather.