Tickets sold by the zoo and the goods sold by the shops inside, and catering are the most basic sources of income for the zoo. As we know, when you go to a zoo, the entrance fee is tens or even hundreds of dollars, which of course depends on the scale of the zoo. In addition, there are some unique zoos that sell related handmade products. For example, Chengdu Zoo has a unique panda. Then there must be dolls selling pandas, and there are some pandas around. Running in the same zoo by hand is very big, and people will get tired after walking in it for a long time. They may solve lunch or buy water bread in it when they rest. These are the most basic incomes.
Secondly, the animals in the zoo can reproduce, and these newborn animals will become another income of the zoo. The number of many animals in the zoo should be counted and recorded, because when the zoo was first established, it would definitely have a clear positioning of the basic number. In the subsequent breeding, the number of animals will definitely decrease due to some natural accidents or natural aging, but at the same time, other offspring will be derived from the reproduction of animals, so these derived offspring can be resold or otherwise.
The zoo can also earn income by developing secondary products such as circus performances, animal-themed hotels and animal malls around it. I think this kind of products are mainly hidden products. In some marine zoos, we often find animals performing after going in. For example, some dolphins can take off to swim and even play with people, and some seals can clap their hands and laugh with the trainer's whistle and make some expressions. These are all developed second-class products. Similarly, in some places, if you want to take photos with animals, there is a charge.