Scientists were astounded when the mummified of an odd two-headed creature was found in a Brazilian woodland.

 The exceedingly unusual fid is one of very few instances of joined twins that have ever been observed outside of a person's home.

Scientists were "completely astounded" when they found the well preserved bodies of deceased colonial bats under a Brazilian tree.

The bats were found in Brazil under a tree. (Credit: Laboratorio de Ciências Ambientales, Marcelo R. Nogeira)

It is just the third instance of co-joined bats that has been documented (Credit: Nadja L. Piheiro from the Department of Embriology, Federal University of Rio de Janeiro).

Only the third instance of cooperative bats has been recorded, and specialists are currently analysing their remnants to learn more about the phenomenon.

The bats were believed to be stillborn and to still have the placenta connected when they were found under a mango tree in the country's southeast.

We assume the mother of these twis was roosting in this tree when she gave birth, said to Marcelo Nogeira of the State University of Northern Rio de Janeiro.

It is our goal that incidents like these will spur further interest in bat embryology, a promising and fascinating area of study that may greatly benefit from data currently available in scientific databases.

Poorly understood, conjugated animals only occur once in every 200,000 human births.

Although homa survival rates are around 15%, it is thought that aimal survival rates are far lower.

The bats' distinct heads and hearts can be seen on X-rays, although they share a single spine (Credit: Laboratório de Radiografias, Mse Nacional, Universidade Federal do Rio de Janeiro).

Their entire hair length was above 13 cm (Credit: Nadja L. Piheiro from the Department of Embriology, Federal University of Rio de Janeiro).

According to an X-ray, male bats have distinct heads and ecks, but their spices really bleed into one another.

They also have two distinct, yet comparable-sized hearts.

The e-tire width of the Twis, or icl-di-g wigspa, is around 13 cm.

They were most certainly "Artibes" bats, according to scientists' determination based on their physical traits.