Topical scope
- carrier pigeons: pigeon – keeping, feed, medicines, vitamins, nutrients, veterinary services, preventive treatment, laboratory tests, cleaning agents, minerals, etc.,
- pigeon houses: structure and equipment, racks, nests, patterns, designs,
- transport : means of transport,
- electronic systems,
- time – recorders,
- trophies and prices,
- publications : scientific, popular and veterinary,
- other
