Can angelfish ( Pterophyllum scalare ) count? Discrimination between different shoal sizes follows Weber's law
Decision making at a crossroad
Labeling and family resemblance in the discrimination of polymorphous categories by pigeons
Geometric distortions affect face recognition in chimpanzees ( Pan troglodytes ) and monkeys ( Macaca mulatta )
How do keas ( Nestor notabilis ) solve artificial-fruit problems with multiple locks?
Tracking and capture of constant and varying velocity stimuli
How to measure patch encounter rate
Do birds (pigeons and bantams) know how confident they are of their perceptual decisions?
Do humans use episodic memory to solve a What - Where - When memory task?
Free-ranging dogs assess the quantity of opponents in intergroup conflicts
Clark's nutcrackers ( Nucifraga columbiana ) use gestures to identify the location of hidden food
The impact of phantom decoys on choices in cats
Are dogs ( Canis familiaris ) misled more by their owners than by strangers in a food choice task?
Big brains are not enough