Answer:
Brevis aviscanto.
Explanation:
In the 18th century, Carl Linneaus systematized the use of Latin and Greek names for fauna and flora. The names usually indicate what animal species the animal belongs to as well as a characteristic it possesses. For instance, the Asian tiger mosquito is called Aedes albopictus - aedes means mosquito, albopictus means painted white. As we can see, the word albopictus is an agglutination of two words (albo for white, pictus for painting).
Let's use the same structure for our animal: a little animal that sings like a bird. First, we need to talk about what our animal is. That is unclear in the description, but we know it is small. So we can use "brevis" - small - as our first word. The other thing we know is that our animal is not a bird, but sings like one. Therefore, our next two words are "avis" - bird - and "canto" - to sing. Let's agglutinate them just like what was done to "albopictus", and we have:
Brevis aviscanto.
