Population decline of the House Sparrow Dec FEB Apr 13 2004 2005 2011 26 captures 06 Apr 2001 - 22 Aug 2016 About this capture COLLECTED BY Organization: Alexa Crawls Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period. Collection: Alexa Crawl EB Crawl EB from Alexa Internet. This data is currently not publicly accessible. Passer domesticus in the Netherlands Concerns about the population decline of the House Sparrow Passer domesticus in the Netherlands.