Katherine Homes Trucker Hat- Cacti and HummingbirdCacti + Hummingbird Hummingbirds absolutely love Claret Cup cacti flowers and help propagate it. Hummingbirds are considered to be a keystone species. Keystone species help pollinate and are vital to maintaining a healthy ecosystem. Cacti and hummingbirds share the same threats of climate change such as flooding, drought, habitat loss and increased temperatures. Hummingbirds have additional threats such as pesticides, and overdevelopment. Size: 56 62