Related Experiment Video
Updated: Jul 3, 2026

04:26
Laboratory Maintenance of the Lower Dipteran Fly Bradysia (Sciara) coprophila: A New/Old Emerging Model Organism
Published on: April 19, 2024
A unilateral extra digit in a wild common buzzard (Buteo buteo)
1Wildlife Laboratory, Carmarthenshire College of Technology and Art, Carmarthen, Dyfed, Wales.
Avian Pathology : Journal of the W.V.P.A
|January 1, 1989
Summary
A wild buzzard was found with an extra, underdeveloped digit on its leg joint. This rare anatomical variation in the common buzzard (Buteo buteo) is documented.
Area of Science:
- Ornithology
- Veterinary Anatomy
Background:
- Anatomical variations can occur in wild bird populations.
- Understanding these variations is crucial for species health assessment.
Purpose of the Study:
- To describe a rare anatomical finding in a wild common buzzard.
- To document a vestigial extra digit on the tibio-tarsal joint.
Main Methods:
- Gross examination of a free-living common buzzard specimen.
- Identification and description of the anatomical anomaly.
Main Results:
- A unilateral, vestigial extra digit was identified.
- The digit was located on the tibio-tarsal joint of a yearling buzzard.
Conclusions:
- This case presents a rare anatomical variation in Buteo buteo.
- Further studies may explore the prevalence and implications of such anomalies.
Related Concept Videos
Types of Selection
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
Convergent Evolution
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.The structures that arise from convergent evolution are called analogous structures. They are similar in function even if they are dissimilar in structure. Further, structures can be analogous while also...
Mate Choice
Mate choice—the decision about whom to mate with—is a type of natural selection, since animals must reproduce to pass down their genes. Mate choice is also called intersexual selection because the behavior occurs between the sexes.
Conservation of Declining Populations
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
Testing a Claim about Mean: Unknown Population SD
A complete procedure of testing a hypothesis about a population mean when the population standard deviation is unknown is explained here.
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used; instead...
Estimating a population mean requires the samples to be approximately normally distributed. The data should be collected from the randomly selected samples having no sampling bias. There is no specific requirement for sample size. But if the sample size is less than 30, and we don't know the population standard deviation, a different approach is used; instead...
Complementation Tests
A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
