It is true that the shawm was perhaps the most popular double reed instrument of the Renaissance Period.
I feel like this is what my brain thinks of when it's post to be productive
The second one is the sfumato technique
Depending on where you are brought up, and the difference in society, you will see different things and people will have different beliefs in symbolism. For example, seeing a bird in a picture for a Christian may represent a dove and be seen as peace, but for someone else it may be seen as a vulture and represent death
Natural Horn, the pitch changes along the natural harmonics of the instrument.