Testing yawning hypotheses in wild populations of two strepsirrhine species:Propithecus verreauxiandLemur catta

Yawning, acute stressors, and arousal reduction in Nazca booby adults and nestlings

(2015) Amy C. Liang et al.   PHYSIOLOGY & BEHAVIOR

The socio-matrix reloaded: from hierarchy to dominance profile in wild lemurs

(2015) Ivan Norscia et al.   PeerJ

Abnormal yawning in stroke patients: the role of brain thermoregulation

(2014) Andrew C. Gallup   Frontiers in Neuroscience

Evidence that displacement activities facilitate behavioural transitions in ring-tailed lemurs

(2012) Victoria Buckley et al.   BEHAVIOURAL PROCESSES

In Bonobos Yawn Contagion Is Higher among Kin and Friends

(2012) Elisa Demuru et al.   PLoS One

Evidence for contagious behaviors in budgerigars (Melopsittacus undulatus): An observational study of yawning and stretching

(2011) Michael L. Miller et al.   BEHAVIOURAL PROCESSES

Handling stress initially inhibits, but then potentiates yawning in budgerigars (Melopsittacus undulatus)

(2010) Michael L. Miller et al.   ANIMAL BEHAVIOUR

The Influence of Age, Sex, and Rank on Yawning Behavior in Two Species of Macaques (Macaca fascicularis and M. fuscata)

(2010) Alfonso Troisi et al.   ETHOLOGY

Yawning as a Stereotyped Action Pattern and Releasing Stimulus

(2010) Robert R. Provine   ETHOLOGY

Ethological Study of Yawning in Primates. I. Quantitative Analysis and Study of Causation in Two Species of Old World Monkeys (Cercocebus albigena and Macaca fascicularis)

(2010) Bertrand L. Deputte   ETHOLOGY

What is Communicated in the Antipredator Calls of Lemurs: Evidence from Playback Experiments with Ringtailed and Ruffed Lemurs

(2010) Joseph M. Macedonia   ETHOLOGY

Variation in the Meaning of Alarm Calls in Verreaux’s and Coquerel’s Sifakas (Propithecus verreauxi, P. coquereli)

(2010) Claudia Fichtel et al.   INTERNATIONAL JOURNAL OF PRIMATOLOGY

The daily time course of contagious and spontaneous yawning among humans

(2010) Fiorenza Giganti et al.   JOURNAL OF ETHOLOGY

Why do we yawn?

(2010) Adrian G. Guggisberg et al.   NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS

Why do we yawn? Primitive versus derived features

(2010) Andrew C. Gallup   NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS

Variation and context of yawns in captive chimpanzees (Pan troglodytes)

(2009) Sarah-Jane Vick et al.   AMERICAN JOURNAL OF PRIMATOLOGY

Effects of positive reinforcement training techniques on the psychological welfare of zoo-housed chimpanzees (Pan troglodytes)

(2009) Ori Pomerantz et al.   AMERICAN JOURNAL OF PRIMATOLOGY

Yawning and thermoregulation in budgerigars, Melopsittacus undulatus

(2008) Andrew C. Gallup et al.   ANIMAL BEHAVIOUR

Does yawning increase arousal through mechanical stimulation of the carotid body?

(2007) Jorma Matikainen et al.   MEDICAL HYPOTHESES