The swamp beans were a relatively healthy species. They were found upon both continents, thereby having little to worry about from extinction. However, even they were not excluded from evolution, and as such, a sister species arose. If it were not for the distant separation of their habitats, they may have successfully replaced their ancestors; luckily for the swamp beans, they did not.
This offshoot, known as the biln, had adapted a small set of flat, disk-like cells within the middle of their form. These small clusters of cells are stacked on top of one another in a sequence similar in manner to that of a battery. With these cells, called electroplaques, each biln can produce a very mild electrical charge, which it produces constantly. The electroplaques function by pumping positive sodium and potassium ions out of the cell via transportation proteins, each powered by adenosine triphosphate; this makes them work relatively similar to muscle cells. Each electroplaque is very basic, and can only produce about 0.15 volts of electricity. While relatively weak, the colonial habits of their ancestors have stuck with them, and together they can produce significantly higher voltages. These volts are used extensively in feeding, as they create a static charge that attracts small bits of edible particles to them, allowing them to much more easily feed.
Because of their limited size, solitary biln or smaller colonies will continue their preference towards the release of special proteins to glue organic matter particles together to have them sink so they can more easily feed upon them.
They have completely replaced the swamp beans within the Ichthy Swamp, but in no other location, due to the distance between each of their habitats and lack of proper travel between them.