Insectoid Robotics...

 https://en.wikipedia.org/wiki/Insectoid

https://www.jpl.nasa.gov/edu/teach/activity/design-a-robotic-insect 

https://techxplore.com/news/2020-01-robofly-insect-sized-robot-drift-surfaces.html

Insect-like robots https://www.youtube.com/watch?v=50_kK9phHy8 , https://www.youtube.com/c/mit/videos  

https://news.mit.edu/2021/researchers-introduce-new-generation-tiny-agile-drones-0302

Nice and small enough to explore some hidden places.

https://news.berkeley.edu/2021/07/02/insect-sized-robot-navigates-mazes-with-the-agility-of-a-cheetah/

https://techcrunch.com/2021/03/02/mits-insect-sized-drones-are-built-to-survive-collisions/

Insect-sized robot takes flight: RoboBee X-Wing https://www.youtube.com/watch?v=loHzoeFP9Io

https://www.extremetech.com/extreme/269291-robofly-is-the-first-wireless-insectoid-robot-to-take-flight

https://www.roboticstomorrow.com/article/2018/06/the-world-of-insect-cyborgs/12087

https://robotics.sciencemag.org/content/5/44/eabb0839

https://physics.aps.org/articles/v13/60

Of course robots can be in any shape or form.

10 Amazing Robots That Really Exist https://www.youtube.com/watch?v=sZ_-yb-TN9M

https://thedigitallabyrinth.blogspot.com/search?q=robotics