Related Experiment Video

Updated: Jul 11, 2026

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
07:34

Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients

Published on: August 22, 2018

Mountain bluebirds: experimental evidence against altruism

H W Power

    Science (New York, N.Y.)
    |July 11, 1975
    PubMed

    More Related Videos

    A Method for Investigating Change Blindness in Pigeons (Columba Livia)06:14

    A Method for Investigating Change Blindness in Pigeons (Columba Livia)

    Published on: September 7, 2018

    Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments09:03

    Manipulation of Color Patterns in Jumping Spiders for Use in Behavioral Experiments

    Published on: May 21, 2019

    Related Concept Videos

    Altruism01:03

    Altruism

    Altruistic behaviors are “unselfish” behaviors—those that help another individual at the expense of the individual carrying out the behavior. Despite the negative consequences for the altruistic animal, these behaviors are thought to have evolved for several reasons.
    Conservation of Declining Populations02:07

    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.
    Egoism and Altruism01:55

    Egoism and Altruism

    Voluntary behavior with the intent to help other people is called prosocial behavior. Why do people help other people? Is personal benefit such as feeling good about oneself the only reason people help one another?
    Inclusive Fitness00:57

    Inclusive Fitness

    Most altruistic behavior—in which one animal helps another at a cost to themselves—occurs between relatives. Scientists think these altruistic behaviors evolved because they increase the inclusive fitness of the animal providing help.
    Optimal Foraging00:48

    Optimal Foraging

    How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
    Mate Choice01:20

    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.