[5] Karanji Lake was one of the favourite haunts of migratory birds like herons and egrets.

[3] In order to prevent the destruction of this lake and to renovate it, help was sought from the Asian Development Bank (ADB), Karnataka Urban Infrastructure Development Finance Corporation (KUIDFC) and Zoo Authority of Karnataka (ZAK).

12 million was provided by ADB and ZAK undertook the restoration work with the co-ordination of KUIDFC.

Other restoration activities included removal of polluted silt, de-weeding of the entire lake surface, removing 30 cm of silt from the lake, restoration of feeder channels, construction of a jetty to start boating facility, and the construction of a bridge to the newly created 'butterfly park'.

[6] Hornbills, peacocks, white-peacocks, turkeys and black swans are some of the birds found in this aviary.

[8] Some of the common migratory birds found here are grey pelican, painted stork, ibis, cormorant, egret, etc.

[9] Herons, Asian open bill storks, egrets, red wattle lapwing, sandpipers, rose ringed parakeet, black drongo, brown shrike, red-whiskered bulbul, booted warbler, sunbird and greenish warbler are some of the other species of birds found here.