Dan Riskin reports that when a species of bird goes extinct, the void it leaves behind can never be filled by the species that replace it.
Subscribe to CTV News to watch more videos:
Connect with CTV News:
For the latest news visit:
For a full video offering visit the CTV News Network:
CTV News on Facebook:
CTV News on Twitter:
Watch CTV News on Twitter:
CTV News on Google+:
CTV News on Instagram:
CTV News on Pinterest:
CTV News is Canada's most-watched news organization both locally and nationally, and has a network of national, international, and local news operations.