In John Green's database there are variables that cover different characteristics. I know you are requesting any particulars from folks here who are knowers but thought I'd help you get the ball rolling The variables in the database include Human-like nose/ape-like nose, small nose/large flat nose. Human-like face/ape-like face and other distinguishing features such as eye shape, teeth, hair on the face, ears that show and facial skin color. These are but a few of the descriptive terms in the database that witnesses have reported. There's much, much more. I know because from 2013-2016 I worked on the database revising it. The revision involved breaking out many of the original variables into separate fields in order to do more specific searches when sorting for certain data groups. I also worked on getting it into chronological order which was my main goal..
And yes, it took three years on and off (mostly on) to do the work. I had emailed the late John Green in 2014 (I think) and told him what I was doing and he wrote back that he was delighted that someone had finally taken an interest in it after 12 years laying idle. In the summer of 2015 I wrote to him again and asked if he would sign an original copy of his 1978 Hancock House "Sasquatch: The Apes Among Us" which he graciously agreed to do. He was 86 at the time. I sent him the copy along with $20 to pay for its return mailing and he sent the book back signed with a $10 bill in change. A year and a half later, in May of 2016, he passed away. He was quite a guy.