<http://schema.org/keywords>
"bird, guard, india, fish, heron, wildlife, wild, territory, karnataka, grey heron, bheemeshwari, mahseer, black, grey, nature, white"^^<http://www.w3.org/2001/XMLSchema#string>
<https://marketplace.500px.com/photos/17748417/grey-heron-guards-it-territory-by-ravi-meghani>