I thought I had found all the Invaders I was going to find but I found two this week and I had walked by both dozens of times without noticing them.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/25955895@N03">Phillip Pessar</a> from Miami, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/southbeachcars/13458082574/">Space Invader</a>