The study of birds, called ornithology, is challenging because there are so many different kinds of birds and bird species. Studying them carefully is very difficult to do. Due to the unique characteristics of birds and their migration patterns, the study of ornithology is difficult. Ornithologists used popular methods to help them study birds, which include bird liming and cannon netting.
Bird liming is a method of trapping birds for the sake of studying them, particularly as a part of ornithology. It is carried out with the use of bird lime that is spread on the branches or twigs of a tree where birds land. Different ways can be used in preparing bird lime. One is through the use of holly bark, which is boiled for a maximum of 12 hours. There are other versions of bird lime such as one that originated in Damascus. This lime is supposed to be made from sebestens. The use of bird lime is prohibited in most countries because it is considered to be inhumane to the birds.
Cannon netting is another way of catching birds. This method is often used when large numbers of birds are to be caught for tagging purposes or for the acquisition of biometric data and other scientific information. Cannon netting is often used with nets that are pulled by explosive-driven projectiles that often cover a predetermined area on the ground. An alternative to the conventional nets are rocket nets, which differ in the way the nets are pulled over the area.