scholarly journals Why human environments enhance animal capacities to use objects: Evidence from keas (Nestor notabilis) and apes (Gorilla gorilla, Pan paniscus, Pongo abelii, Pongo pygmaeus).

2018 ◽  
Vol 132 (4) ◽  
pp. 419-426 ◽  
Author(s):  
Ken Cheng ◽  
Richard W. Byrne
2020 ◽  
Vol 134 (2) ◽  
pp. 252-261
Author(s):  
Jordi Pladevall ◽  
Natacha Mendes ◽  
David Riba ◽  
Miquel Llorente ◽  
Federica Amici

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