Yes. This was in the UK and there is a bird well known for this. It is quite an interesting story about how the whole population learned.Are you certain it was birds? Sounds more like something a squirrel or a coon might do.
https://www.birdspot.co.uk/bird-behaviour/blue-tits-and-milk-bottle-tops
 
	 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		 
 
		 
 
		
 
 
		 Cheaper, with many more options available with what you do buy. Sort of like buying a rice cooker which cooks rice….and only rice while a saucepan with a lid can cook rice AND other things. Multitasking with ingredients and equipment is the only way to go……IMO
Cheaper, with many more options available with what you do buy. Sort of like buying a rice cooker which cooks rice….and only rice while a saucepan with a lid can cook rice AND other things. Multitasking with ingredients and equipment is the only way to go……IMO 
 
		 
			
		
		
		
	
	
			
		

 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		