Birdseed Vault Big and Tall. The Birdseed Vault series features patented squirrel-proof technology including weight actuated baffles and a locking lid. These single or double-sided feeders feature top quality components such as stainless steel perches, adjustable springs and a high quality powder-coat finish. The perching distance is engineered to appeal to desirable species such as Cardinals and Grosbeaks as well as smaller birds such as Finches and Chickadees.