Front cover: Cover image: see E. Schachner et al., 'Anatomy, ontogeny, and evolution of the archosaurian respiratory system: a case study on Alligator mississippiensis Struthio camelus', this issue.

ABSTRACT: This study discusses the epidemiological, clinical, and pathological characteristics of two outbreaks ocular infection in ostriches (Struthio camelus) caused by trematode Philophthalmus sp. The occurred states Ceará Rio Grande do Norte Northeast Brazil. Ostrich farming was categorized as semi-intensive with free access to weir river. clinical symptoms for included nictitating membrane...

A comprehensive description of the spectral characteristics of retinal photoreceptors in palaeognaths is lacking. Moreover, controversy exists with respect to the spectral sensitivity of the short-wavelength-sensitive-1 (SWS1) opsin-based visual pigment expressed in one type of single cone: previous microspectrophotometric (MSP) measurements in the ostrich (Struthio camelus) suggested a violet-...

Simple testicular cysts are rare in birds and mammals. However, the condition has recently been reported in the ostrich (Struthio camelus), an economically important farmed bird. The innervation of normal and cryptorchid testes, unlike the simple testicular cysts of birds and mammals, has received considerable attention. This study, therefore, immunohistochemically demonstrates the presence and...