Where the image was taken from, e.g.:
\Image[https://upload.wikimedia.org/wikipedia/commons/6/68/Akha_cropped_hires.JPG]
{title=A couple}
{source=https://en.wikipedia.org/wiki/Human}
which renders as:
The
source
is automatically inferred for certain known websites, e.g.:- Wikimedia
https://upload.wikimedia.org/wikipedia/commons
Example:\Image[https://upload.wikimedia.org/wikipedia/commons/6/68/Akha_cropped_hires.JPG] {title=A couple no source}
which renders as: