Lions Photos

There is a lot of lions with masks on them.
Why are the lion sitting there?
                                       

Why do they have numbers on them?
There are seven lions.
Why do they have masks on them?

https://www.nationalgeographic.com/animals/2019/05/mozambique-spirit-lion-relocation/?cmpid=org=ngp::mc=crm-email::src=ngp::cmp=editorial::add=sunstills_20190512::rid=1018652856#/mozambique-lion-relocation-28.jpg