Noun
kleptoparasitism (uncountable)
The parasitic theft of captured prey, nest material, etc. from animals of the same or another species.
Bald eagles are less active, bold predators than golden eagles and get relatively more of their food as carrion and from kleptoparasitism (although it is now generally thought that golden eagles eat more carrion than was previously assumed). Source: Internet
If they fall off, they most likely would not have the strength to climb back on top of another ant, and eventually they will die. citation In kleptoparasitism (from the Greek κλέπτης (kleptes), thief), parasites appropriate food gathered by the host. Source: Internet
In some cases, these may be attacks of competition or kleptoparasitism on rival species but ended with the consumption of the victim. Source: Internet