Birds in the city no longer live on trees or in nests made of twigs and leaves.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/green-cover-diminishing-birds-now-build-nests-plastic
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-pune-0
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pune-t
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/trees
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/deforestation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/birds
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/grasslands
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wetlands
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests