What is the cooing bird?

It's Rhododendron, and its Chinese scientific name is Rhododendron.

It belongs to the order Gnaphanides, Ericaceae and Rhododendron. Scattered individual movements are common, sometimes in pairs, but it is difficult to see clusters. Can be seen in trees in mountains and plains. Rhododendrons are relatively easy to see near residential areas. Their songs are so loud that they once sounded like "goo goo -Ku", that is, they repeatedly made "goo goo" sounds, and the name "goo goo" was also derived from their cries.

Extended data:

Liu Kezhuang, a poet in the Song Dynasty, wrote ... Du Yu cries blood and willow blows snow. Blowing into snow, light smoke and drizzle, March in Jiangnan. This word refers to a fairy tale: Du Yu, the king of Shu, proclaimed himself emperor at the end of the Zhou Dynasty. At that time, a man who came back from the dead, Master Roshi, became prime minister. At that time, there was a flood and the people were miserable. Master Roshi dug Wushan Mountain, opened the Three Gorges to eliminate floods.

When Wang Di saw his success, he gave him the throne and lived in seclusion in the Western Hills. Du Yu paid attention to teaching people to farm before his death, but his nature remained unchanged after his death. He became a cuckoo (also called cuckoo). Every spring, he always called people "cuckoo" and "cuckoo" to remind people to sow in time.

This is the time when azaleas are in full bloom. The ancients thought that rhododendron had erythema on its mouth, which was blood from bitter crying. So there was "the blood of innocent birds was stained with E", commonly known as azaleas. ?

The legendary cuckoo crying blood should be a cuckoo with four tones, commonly known as cuckoo. Because of careful study, the oral epithelium and tongue of rhododendron are red, which the ancients mistakenly thought was full of blood. When cuckoo sings, it is the time when azaleas are in full bloom, so there is a saying that the color of azaleas is dyed with blood by cuckoo's cry: "What are the merits of azaleas and birds?" It is suspected that the blood in the mouth drips into the flowers on the branches. "

("Complete Tang Poetry" Volume 759 "Rhododendron" sentence) "Rhododendron flowers send rhododendrons, like blood like Zhu. It should be that I can't stay in spring, and the night wind is cold. "

References:

Baidu encyclopedia-cuckoo