Different between a bird and a rat​

Explanation:

Rats and mice are both rodents, so look similar - the biggest difference is their size. Rats are larger and heavier while mice have smaller slender bodies. Mice also have long slender tails (for their body size) covered in hair compared to rat tails which are shorter, thicker and hairless

Explanation:

Difference between a bird and a rat​ are :

Rat

1. Rattus is a genus of muroid rodents, all typically called rats

2. It is possible for rats to transmit diseases to humans

Birds

1. Birds are a group of warm-blooded vertebrates constituting the class Aves

2.  Their bones are hollow in nature