Highlights•Birds have small brains but much more neurons per pallial mass than
primates.•Corvids have 6 times less pallial neurons than chimps but 6-17 times more than …

The last several decades of research on avian cognition have revealed surprising parallels
between the abilities of birds—most notably corvids—and great apes. Parrots, albeit far less …

At first glance, birds and non-human primates (hereafter primates) seem very different. Birds
have beaks, feathers, produce offspring that gestate in shells, and can fly. Primates are …

Recent years have witnessed an astonishing flurry of studies demonstrating that some bird
species show higher-order cognitive processes on par with primates [1–3]. As birds have no …

Although the common ancestor of birds and mammals lived over 280 million years ago,
there are striking similarities in the cognitive abilities of members of the crow family (corvids) …

Since the classic work by Kohler (1925/1976), Yerkes and Yerkes (1929), and Tinklepaugh
(1932), researchers have been developing methods to investigate the minds of apes. In this …

Many cognitive neuroscientists believe that both a large brain and an isocortex are crucial
for complex cognition. Yet corvids and parrots possess non-cortical brains of just 1–25 g …

This chapter considers cognition in great apes as integrated systems that orchestrate the
many abilities that great apes express, systems for which satisfactory characterizations …

Both the number and breadth of avian cognition studies have expanded in the past three
decades. Parrots have a long history as subjects in avian cognition research. This paper …

This study investigated the ability of chimpanzees, gorillas, orangutans, and bonobos to
make inferences by exclusion using the procedure pioneered by Premack and Premack …