1、An article mentions that on many oceanic islands, birds that do not fly are more common.
2、There is an article mentioning the existence of birds that have disappeared on the island of New Zealand.
3、There is an article mentioning several flightless giants.
4、Small and medium wading birds can develop independently in the group.
5、The evolution of the flight will be very rapid.
6、No predators and limited food can cause bird stall evolution.
7、Evolutionary responses produce flying muscles.
8、Selective pressures do not compensate for the quality of flying muscles.
9、Bird differences in tropical islands and temperate regions.
10、Birds in the temperate zone have to fly.
11、The evolution of birds is a vivid illustration of the island (poignant illustrations of).
12、Forms specifically for island environment flight disappear after humans and other animals have settled.