Elephants are highly social animals, which are active for 18 hours a day and travel as far as 30 miles a day.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/karnataka-elephants-suffer-captivity-induced-health-problems
[2] http://admin.indiaenvironmentportal.org.in/category/author/nd-shiva-kumar
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/economic-times-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/karnataka
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/elephant
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bandipur-np
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nagarahole-np
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/animal-diseases
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife