🐒Animals such as Campbell's monkeys have been observed using grammatical elements in their vocalizations.
🐦Alex the grey parrot demonstrated advanced language skills, including asking and answering questions.
🐶Dogs like Rico and Chaser have shown the ability to learn and understand a large number of words and concepts.
🐵Apes, such as Lana, Kanzi, and Koko, have been trained to use symbols or sign language for communication.
🐬Dolphins have been taught to use underwater keyboards and acoustic labels to communicate with humans.