By far the most popular method of communication is via owls. Owls are used for conveying packages, with multiple owls acting in concert to deliver heavier packages. Owls also deliver mail and newspapers, acting as a replacement for the postal service of the Muggle world. If an owl delivers something for which payment is expected, such as a newspaper, the recipient places the money in a small pouch attached to the owl's leg. Not only owls may be used; Sirius Black makes use of a tropical bird, likely a macaw, on one occasion. The Ministry of Magic regulates Owl Mail.