Numerical discrimination by frogs (Bombina orientalis)

Discrimination of small quantities by fish (redtail splitfin, Xenotoca eiseni)

(2013) Gionata Stancher et al.   ANIMAL COGNITION

One, two, three, four, or is there something more? Numerical discrimination in day-old domestic chicks

(2013) Rosa Rugani et al.   ANIMAL COGNITION

From small to large: Numerical discrimination by young domestic chicks (Gallus gallus).

(2013) Rosa Rugani et al.   JOURNAL OF COMPARATIVE PSYCHOLOGY

Numerical Abstraction in Young Domestic Chicks (Gallus gallus)

(2013) Rosa Rugani et al.   PLoS One

Further evidence for addition and numerical competence by a Grey parrot (Psittacus erithacus)

(2012) Irene M. Pepperberg   ANIMAL COGNITION

Large quantity discrimination by North Island robins (Petroica longipes)

(2012) Alexis Garland et al.   ANIMAL COGNITION

Quantification abilities in angelfish (Pterophyllum scalare): the influence of continuous variables

(2012) Luis M. Gómez-Laplaza et al.   ANIMAL COGNITION

Tracking of food quantity by coyotes (Canis latrans)

(2011) Joseph M. Baker et al.   BEHAVIOURAL PROCESSES

Is it only humans that count from left to right?

(2010) R. Rugani et al.   Biology Letters

Quantity discrimination in Tenebrio molitor: evidence of numerosity discrimination in an invertebrate?

(2009) P. Carazo et al.   ANIMAL COGNITION

Horses (Equus caballus) select the greater of two quantities in small numerical contrasts

(2009) Claudia Uller et al.   ANIMAL COGNITION

Representation of Number in the Brain

(2009) Andreas Nieder et al.   Annual Review of Neuroscience

Number-Based Visual Generalisation in the Honeybee

(2009) Hans J. Gross et al.   PLoS One

Arithmetic in newborn chicks

(2009) R. Rugani et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Relative quantity judgment by Asian elephants (Elephas maximus)

(2008) Naoko Irie-Sugimoto et al.   ANIMAL COGNITION

Complete nucleotide sequence and gene arrangement of the mitochondrial genome of the crab-eating frog Fejervarya cancrivora and evolutionary implications

(2008) Zhumei Ren et al.   GENE

Discrimination of small numerosities in young chicks.

(2008) Rosa Rugani et al.   JOURNAL OF EXPERIMENTAL PSYCHOLOGY-ANIMAL LEARNING AND COGNITION