What is that, you ask? It's a rat king, or rather, the mummified remains of a rat king. A rat king, according to the Wikipedia, is a mass of rats whose tails have become inexplicably intertwined.
Rat kings are cryptozoological phenomena said to arise when a number of rats become intertwined at their tails, which become stuck together with blood, dirt, and excrement. The animals consequently grow together while joined at the tails, which are often broken. The phenomenon is particularly associated with Germany, where the majority of instances have been reported.
Sort of like the Lower House of the Philippine Congress, eh?