the fleas would jump from people to people spreading the infection.
Black Mambas do not migrate.
they migrate to italy
Black footed ferrets are not known to migrate
No, you cannot migrate GBA Pokemon to Pokemon Black/White.
yes
yes they do
No
Yes black widow spiders migrate to various different places. The scientific name of the black widow spider is Latrodectus mactans.
you have to migrate it
Most don't, no.
No
Yes. After you beat the main story, you can migrate from daimond, pearl, platinum, heartgold, and soulsilver versions to black and white