This is the default set of cowfiles that ships with cowsay.
This cowjar packages cowfiles from https://github.com/schacon/cowsay.
A few potentially offensive ones are excluded but can be added using either COWPATH environment variable or cowjar-off.
Cowjars are simply a jar file containing a cows directory with cowfiles that can be placed on the classpath, for example using Maven:
<dependency>
<groupId>com.github.ricksbrown</groupId>
<artifactId>cowjar-extra</artifactId>
<version>1.1.0</version>
</dependency>Java cowsay will find them there and use them in commands like cowsay -list and cowsay -f cheese.
A few are provided but you can build your own.
The actual cowfiles are fetched at build time which is why you do not find most/any cowfiles in the source.