In order to pass for certain types of body percentages in art, it will help to understand what we count for 'headshot', 'bust', 'halfbody', and 'fullbody'. This guide is here to explain the differences in the meanings.
The following images are rough ranges to illustrate the sections of the body for each of our percentages.
First up, we have Headshots. Headshots typically encompass one section (Which does not necessarily have to be the head!) or possibly a little more than the one section. If doing foot-shots, you don't have to do all feet, one foot will still count. Wings count as their own section.
Secondly, we have Busts. Busts have to include two entire sections at minimum, and the sections must be connected. It can show a little more than the two sections, or possibly even three connected sections in total. Wings can count as a seperate section, but to count as a bust it must include most of two other connecting or nearby sections.
Third, we have Halfbodies. Halfbodies must include at least 4 sections, though 5 is often preferrable. If the character has wings, they should not obscure any section fully. They can include 6 sections if doing the front half of the body (In the case of doing the feet or wings/whisker ends).
Finally, we have Fullbodies. Fullbodies may only have one section hidden in the image. The rest should be visible, though can be slightly obscured by environment or other details. Wings can hide a max of one body section, and most of a second but not all.