Charted from historic French cross stitch book Maison Sajou Miniature Album no. 3. The pattern was found at http://patternmakercharts.blogspot.com/2009/07/pattern-maker-xsd-file-sajou-no-3.html
This is a clone of Sajou 002-5go to orange sans for the other version of this font
This is a clone of Orange SansA trapezoidal sans-serif with a flattened groovy look.
The name is a play on the bird called "bustard" and the phrase "Bunker Buster" since these glyphs sort of look like bunkers that have been flipped upside down.