What is the smallest species of bat?            
            
            
                                            
                                                    
                    lesser short-tailed bat
                    
                                        
                    164
                    
                    
                 
                
                    Pallas's long-tongued bat
                    
                    
                    208
                    
                    
                 
                
                    Kitti's hog-nosed bat
                    
                                        
                    654
                    
                    
                 
                                            
               
                                                                                   
            Kitti's hog-nosed bat, also known as the bumblebee bat, occurs in western Thailand and southeast Myanmar, where it occupies limestone caves along rivers. It is about 29 to 33 mm in length and 2 g in mass, which makes it the world's smallest bat.