6:09 PM, Wednesday September 9th 2020
Thank you a lot for good critique and answer to my question!
After reading the feedback I see more clearly my mistakes.
The Ant looks a bit messy because I tried to go beyond basic structure in the middle part.
In beetle drawing I drew 'bigger than head' circle. It was only way for me to feel it's form. Probably wasn't by-the-book solution.
In last drawing I made 2D spikes on legs, sorry about those, I just understood my mistake what I made. My brains seems to go 2D mode sometimes.
references:
1 Ant: https://www.flickr.com/photos/andreaskay/48841988897/
2 Beetle : https://www.yates.com.au/media/rq2j11zi/black-beetle.png
3 Brentus volvulus: https://www.flickr.com/photos/andreaskay/48843896866/in/photostream/
4 Phylloscirtus sp.: https://www.flickr.com/photos/andreaskay/48862446481/