Related Experiment Video
Updated: Jun 25, 2026

A Video Surveillance System to Monitor Breeding Colonies of Common Terns (Sterna Hirundo)
Published on: July 22, 2018
Deaths in free-living barn owls (Tyto alba)
1Veterinary Research Institute, Parkville, Australia.
Abstract:
Pathological examinations were made on 20 free-living barn owls, Tyto alba, that died during winter-spring 1985 Victoria, Australia. Starvation was the likely cause of the deaths with all the birds being in poor condition and markedly underweight (235 to 265 g). The owls had suffered a massive decline in the abundance of their prey, the house mouse, Mus musculus, following the end of a mouse plague. The life cycle of the barn owl makes it susceptible to deaths due to starvation following seasonal variability in prey availability. A secondary finding was localised erosions of the gizzard mucosa associated with infestation by cestodes of the genus Choanataenia.
More Related Videos
Related Concept Videos
Conservation of Declining Populations
Lethal Alleles
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Overview of Cell Death
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Free-falling Bodies: Example
The...
Life Tables
Toxoplasmosis

