@bagder Doesn’t feel like the appropriate metaphor, since the relationship in the picture is symbiotic, they both benefit:
> birds that land on elephants and spend their days eating lice, ticks, and other parties out of the elephants’ skin and hair. The elephants benefit by having dangerous critters removed from their bodies, and the oxpeckers get a snack and a free ride. It’s also been seen that oxpeckers, like the olive baboons, warn elephants of danger when they spot predators, by emitting loud screams.
https://globalelephants.org/elefact-friday-symbiotic-relationships-in-the-wild/
On the other hand, the point I think you’re trying to make is about the parasitic relationship of some closed-source software towards open-source. Perhaps an image of a leech would be more appropriate.