Linked from
The 70 pages that link to Mammal, each with the reason it gives.
ErinaceidaeNarrower topic: Erinaceidae is one family within the mammalian radiation.
LophiodonNarrower topic: Lophiodon shares the defining traits of mammals.
VespertilionidaeNarrower topic: Bats belong to this broader vertebrate class.
XeriniNarrower topic: Xerini's squirrels are mammals within this broader animal group.