It is definitely a Botfly Larvae. I have seen them plenty of times on squirrels when I used to hunt them. Those things wriggling around in there give ya the willys.
I have never heard them called anything but WARBLES.
As for people, there was a show on Discovery a while back that talked about various parasitic infestations that humans had gotten. Yes one of them was a Botfly larvae like the one pictured. The guy had it removed and saved it in a jar. They replay the show all the time, you should check it out. I think the worst case they talked about on the show was from the Amazon area. There are these fish down there that need UREA and they normally get into animals but this time ole Pablo was taking a leak in the water and one of these 5 inch fish was attracted to the Uric Acid in his urine and swam right upstream into "you know where!" Once it gets in it uses its fins to anchor itself until it satisfies its needs. They showed the fish in a jar and several scientists said they always heard it as an old wives tail but it finally proved true about the possibility of human infestation.
Talk about having a BAD day!!
Nala