The red-crested tree rat hadn't been seen by scientists for more than a century — until this May. The guinea pig-sized creature, with a... Presumed Extinct, The Red-Crested Tree Rat Returns The ...

Volunteers spotted the red-crested tree rat on May 4 at a nature preserve in Colombia. The rodent is covered in reddish hair. It is about the size of a guinea pig. The mysterious species hasn't been ...

After 113 years in hiding, the red crested tree rat (Santamartamys rufodorsalis) has appeared once again and posed for its first ever photographs. The small mammal, not seen since 1898 despite several ...

WASHINGTON — A unique and mysterious guinea-pig-sized rodent, not seen since 1898 despite several organized searches, bizarrely showed up at the front door of an ecolodge at a nature reserve in ...