When do Chinese river dolphins give birth?

Unfortunately, the exact timing of birth for Chinese river dolphins (Lipotes vexillifer) is unknown.

Here's why:

* Extinction: The Chinese river dolphin was declared functionally extinct in 2006. This means there are no known surviving individuals in the wild.

* Limited Research: Before their extinction, there was limited research on their reproductive habits.

While we don't have specific data on birth season, it's likely that, like other dolphin species, the Chinese river dolphin had a seasonal breeding pattern.

It is possible that future research on the species, using historical data or genetic analysis, could shed light on their reproductive cycle.