The Royal Society for the Protection of Birds (RSPB) said that as well as the house sparrow, the starling was another familiar garden bird to feature on the BAP list of 59 bird species.
The lead IPCC investigator, Colin Sparrow, said he was unaware of the existence of a crucial piece of evidence - the shoebox - until a week after the shooting.
Savill, who represents himself in the virtual world using an avatar named Dave Sparrow, said one benefit is that visitors can practice social interaction and find information about the condition.