آزمایش های کلاغ نشان می دهد که تغییر به ارتباطات صوتی نیاز به تلاش ذهنی بیشتری دارد

Crow experiments suggest switching to vocal communication requires extra mental effort

For animals that can produce vocalizations, choosing to emit a sound involves various neural processes. For instance, it entails controlling when to emit a sound and how loud and high-pitched the sound will be, while also adaptively switching between vocalizations and other behaviors in response to changing circumstances.