Just found full picture on https://testrun.org
Part of it is present on web page of every stock chatmail server installation.
Dinosaurus is (probably) Deltadromeus (fast runner with Delta in the name).
What are the story with other pics in the collage? Who is the author?
As far as I know it was created by Mona Lange (@jarwski@mastodon.art) - Mastodon.ART
It’s truly gorgeous art with incredible energy to it.
I wish the Delta Chat app itself reflected that same aesthetic style and energy.