My entry for the weekly competition! It was difficult picking the colours and I don't think I did a great job but I enjoyed drawing the ant.
Forest at Night-time, Raining (5 colours)
http://gifmaker.cc/PlayGIFAnimation.php?folder=2015042607wxF0ibbNUbeOhd2wrF37HR&file=output_8zujmw.gif
This is a link to a gif showing my progress, as you can see I couldn't make my mind up about a lot of it, I googled 'ant' for references on ant anatomy. | 
Weekly Challenge: Earth
It doesn't really read as night, but I really dig the colors and pseudo-random dithering. Really gives it a mood/style. The checkerboard dithering in the corners (most notably in the top right corner) is a little distracting and could be polished to give more depth/texture. Nice work regardless, and good luck!
And welcome to pixeljoint!