In 2016, a shrill shrieking sound in Forest Grove started keeping people up at night and causing dogs to bark incessantly. Naturally, theories abound on what could be causing the mysterious pinging, including a Greenpeace effort to save seals from being hunted and sonar surveys, but none of them have been conclusively proven. Considering that the last sighting of Cecil’s plane was near Kent, they believed it was too far from the Belgium beach for the remains to have been Cecil’s.