Matrimonios 1752 of Huejuquilla Curious about the drawing of bird in book

I am still trying to find the defunto record of my great great great great granfather Francisco Madera whose wife is Maria Leocadia De Huizar.

So I am trying to look in the matrimonios and my estimate of when they got married would be sometime before the year 1762 when then had a son name Juan Venancio (Benancio) Madera, Espanol.

I started in the year 1752 and my curiousity is the drawing of a bird the author of matimonios book made. Trying to go into the mind of the author? Did he draw it based on a bird he has seen and where did he see it.

http://oi58.tinypic.com/1zqxcoi.jpg

Source:

https://familysearch.org/pal:/MM9.3.1/TH-1-18449-46024-19?cc=1874591&wc=MCCX-2M9:171931201,171931202,175236701