A recent study published in the journal Science Advances found that zebra finches can recall voices much as humans can. According to the research from the University of California, Berkeley, these songbirds recognize one another based on a song or contact call. They have the ability to quickly memorize distinct sounds of at least 50 members of their flock.
The red-beaked zebra finch can pick up on specific tones from familiar finches, much like humans do with their friends. When a friend calls, or we hear their voice in a crowd, we can instantly distinguish them. Zebra finches have almost this same capacity for language mapping and communicating with other birds. According to the study, they also have the uncanny ability to remember each other’s distinct vocalizations for months or even longer.
“The amazing auditory memory of zebra finches shows that birds’ brains are highly adapted for sophisticated social communication,” said lead author of the study Frederic Theunissen, a UC Berkeley professor of psychology, integrative biology, and neuroscience.
Theunissen and a team of researchers wanted to investigate the songbirds’ scope and magnitude to distinguish vocalizations. Their findings showed that the birds performed even better than they had expected.
“For animals, the ability to recognize the source and meaning of a cohort member’s call requires complex mapping skills, and this is something zebra finches have clearly mastered,” Theunissen said.
Theunissen has studied bird and human communication patterns for around two decades. He collaborated with UC Berkeley postdoctoral fellow Julie Elie, a neuroethologist who has studied zebra finches in Australia. Their work has provided a fascinating insight into the communication skills and vocalizations of this songbird.
- Zebra finches are the most popular finch species.
- Their life span is around 10 years.
- While the zebra finch is small, it’s not the tiniest of the finch species.
- The species takes its name after the zebra-like stripes on its neck, chest, and tail.
- You can tell males and females apart by the coloring on their beaks. The males have red bills, and the females have orange.
- They originated in the remote desert areas of Central Australia, but they also thrive in Timor and Indonesia.
- Zebra finches love to sing, while females usually don’t. This is because males use songs as mating calls.
- This bird doesn’t do well alone. Indeed, they thrive when kept in pairs. They make a wonderful beginner pet bird, as they don’t need a lot of care or time commitment.
- While these birds love being social with each other, they don’t bond strongly with people. With training, a pet bird will eventually come to your hand, however.
The zebra finch typically travels in colonies of 50 to 100 birds, flying apart and then regrouping later. Their songs are usually mating calls. However, they also employ distance calls to locate one another.
“They have what we call a ‘fusion fission’ society, where they split up and then come back together,” Theunissen said. “They don’t want to separate from the flock, and so, if one of them gets lost, they might call out ‘Hey, Ted, we’re right here.’ Or, if one of them is sitting in a nest while the other is foraging, one might call out to ask if it’s safe to return to the nest.”
Theunissen keeps a few dozen zebra finches in aviaries on and around the UC Berkeley campus. He used 20 of them in the study about communication skills and vocalizations.
The zebra finch study
In the two-part experiment, the team trained 20 captive zebra finches to recognize different birds based on their vocalizations. They first trained half the birds to memorize songs, and the other half learned to recognize distance or contact calls. Then, they switched the tasks so the other half of the flock could learn.
Then, they placed each zebra finch, one by one, into a chamber where they listened to sounds as part of a reward system. In doing this, the team wanted the birds to memorize different renditions of the zebra finches’ sounds.
When they pecked a key inside the chamber, the birds triggered an audio recording of zebra finches. If they waited until the six-second recording stopped, the researchers rewarded them with birdseed as a small treat. However, if they pecked before the recording had finished playing, they moved on to the next recording. The birds went through several trials to learn which vocalizations would lead to a reward and which ones they should skip.
After this, the zebra finch flock got introduced to more audio recordings from different birds. This would allow them to learn which vocalizations came from which birds. They quickly learned the various sounds of the 16 different zebra finches.