Dinosaurs, of course, did not use email and text messages to keep in touch with each other. But scientists, nevertheless, are sure that they entered into a dialogue with each other.
Their speech most likely included whistles and shouts, quacks, dances and songs, as well as a symbolic love voice, which was carried out with the help of bright plumage. Since modern birds resemble dinosaurs in many ways, it is not surprising that their ancestors communicated in this way.
Horns, collars and combs were used not only to scare the enemy, but also to attract the attention of the opposite sex. Also, given how large the dinosaurs had eyes, and the fact that crocodiles and birds can distinguish colors, it can be assumed that reptiles did not have any problems with this.
The data available on dinosaur ears show that they had no problem hearing low-frequency sounds. As you can see, they truly belong to the category of advanced organisms. And the Mesozoic era would be an excellent material for modern scientists to study. Provided, of course, that they would not be noticed by the animals prevailing then.
Semenenko Kirill