Metastatic Renal Carcinoma in an African Grey Parrot (Psittacus Erithacus Erithacus)

Comparative Cytogenetics of the Congo African Grey Parrot (Psittacus erithacus).

The Congo African grey parrot (Psittacus erithacus, PER) is an endemic species of Central Africa, valued for its intelligence and listed as vulnerable due to poaching and habitat destruction. Improved knowledge about the P. erithacus genome is needed to address key biological questions and conservation of this species. The P. erithacus genome was studied using conventional and molecular cytogen...

Social context influences the vocalizations of a home-raised African Grey parrot (Psittacus erithacus erithacus).

Home-raised African Grey parrots (Psittacus erithacus erithacus) exhibit strong social bonding with their human companions. We examined how 1 parrot's vocal production (speech and nonword sounds) changed with social context with respect to descriptive measures of the vocalizations and their thematic content. We videotaped the parrot in 4 social conditions: subject home alone, subject and owner ...

Numerical Competence in an African Gray Parrot (Psittacus erithacus)

An African gray parrot (Psittacus erithacus), Alex, trained to label vocally collections of 1-6 simultaneously presented homogeneous objects, correctly identified, without further training, quantities of targeted subsets in heterogeneous collections. For each test trial Alex was shown different collections of 4 groups of items that varied in 2 colors and 2 object categories (e.g., blue and red ...

Journal of Comparative Psychology Social Context Influences the Vocalizations of a Home-Raised African Grey Parrot (Psittacus erithacus erithacus)

Robust representation of shape in a Grey parrot (Psittacus erithacus).

A Grey parrot, Griffin (Psittacus erithacus), previously taught English labels for various colors and shapes with respect to three-dimensional (3D) stimuli, was tested on his ability to transfer to very different two-dimensional (2D) images consisting of modal and amodal completion stimuli. For modal completion (aka subjective contours), Kanizsa figures were constructed using black 'pac-men' to...