乌鸦会“数”数

马列托主义者

乌鸦会数数，除了人会数数外，迄今为止其他动物只有乌鸦也会
Crows “count” the number of self-generated vocalizations | Science
https://www.science.org/doi/10.1126/science.adl0984

Crows can deliberately plan how many calls to make | University of Tübingen
https://uni-tuebingen.de/en/univ ... many-calls-to-make/

Crows Can Actually Count Out Loud, Amazing New Study Shows : ScienceAlert
https://www.sciencealert.com/cro ... ing-new-study-shows

远航一号

好像其它灵长类也有一定的“数”数的能力