Yep animals/birds/fish etc come and go.
Ninety-nine percent of all species that have ever lived have gone extinct over the course of five mass extinctions, which, in the past, were largely a result of natural causes such as volcano eruptions and asteroid impacts. Today, the rate of extinction is occurring 1,000 to 10,000 times faster because of human activity. The main modern causes of extinction are the loss and degradation of habitat (mainly deforestation), over exploitation (hunting, overfishing), invasive species, climate change, and nitrogen pollution.
According to the International Union for Conservation of Nature’s Red List of Threatened Species, over 26,500 species are in danger of extinction. This includes 40 percent of amphibians, 34 percent of conifers, 33 percent of reef-building corals, 25 percent of mammals and 14 percent of birds. In the U.S., over 1,600 species are listed as threatened or endangered.
https://news.climate.columbia.edu/2019/03/26/endangered-species-matter/
These would be evolution deniers...If we don’t let species disappear, it restricts or gets in the way of new species “evolving” through the various speculated mechanisms that have never been observed or repeated.