Related Experiment Video
Updated: Jun 5, 2026
09:03
Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments
Published on: May 21, 2019
Plumage variability, status signalling and individual recognition in avian flocks
1Philip Whitfield is at the Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK.
Trends in Ecology & Evolution
|January 14, 2011
Summary
Plumage variability in flocking birds may not solely signal status. Research suggests other factors, like individual recognition, also play a crucial role in explaining these colorful differences.
Area of Science:
- Behavioral Ecology
- Ornithology
- Animal Communication
Background:
- The 'status signalling' hypothesis proposed plumage variability in flocking birds signals agonistic status.
- This hypothesis has been explored through numerous studies examining the social significance of plumage differences.
Purpose of the Study:
- To evaluate the evidence for the status signalling hypothesis in explaining plumage variability.
- To investigate alternative explanations for plumage differences in flocking birds.
Main Methods:
- Review of existing literature on plumage variability and social signalling in birds.
- Analysis of studies testing the status signalling hypothesis.
Main Results:
- The status signalling hypothesis has not garnered unequivocal support from research.
- Evidence suggests that factors beyond status signalling are important.
Conclusions:
- Plumage variability in flocking birds is likely influenced by multiple factors.
- Individual recognition appears to be a significant factor in explaining plumage diversity, alongside or instead of status signalling.
Related Concept Videos
01:20Mate 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.
00:53Migration
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
01:46Types 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...
01:21Testing 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...
01:38Limits to Natural Selection
Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
00:49Complementation 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...