Hi Mo,
You are right, I have doubt whether bird is running or not because I run in linux "yum install bird" command and "bird.conf" file generated in /etc in root user. In my knowledge its may the installation of BIRD but in real it doesn't seem because I following links shared by you but there installation is based on 'Unix' OS not Linux.
If you have info, how to install BIRD in linux, please share with me because I searched a lot in google BIRD installation in Linux but didn't get. After running bird -c its shows "no such file or directory"