--- title: "The Red Queen Hypothesis" description: "Explore the Red Queen hypothesis: other evolving species can create ongoing pressure for evolutionary change. Compare bats and moths, rabbits and myxoma virus, and flower-pollinator partnerships. Dist" canonical: https://lightmysky.com/learn/science/the-red-queen-hypothesis-mt_mKNmXqz_Oo source: https://lightmysky.com/learn/science/the-red-queen-hypothesis-mt_mKNmXqz_Oo.md retrieved: 2026-11-12 --- > **Agent view.** This is the Markdown twin of the page, for tools and assistants. > When to use this site, and the call that answers each job: https://lightmysky.com/agent-instructions.md > API description (OpenAPI 3.1): https://lightmysky.com/openapi.json · Authentication: https://lightmysky.com/auth.md > Pricing: https://lightmysky.com/pricing.md · Catalog: https://lightmysky.com/llms.txt · Full catalog: https://lightmysky.com/llms-full.txt > Every machine-readable file on this domain: https://lightmysky.com/.well-known/ai-catalog.json > Ask for Markdown with `Accept: text/markdown`, a `.md` address, or `?mode=agent`. # The Red Queen Hypothesis Explore the Red Queen hypothesis: other evolving species can create ongoing pressure for evolutionary change. Compare bats and moths, rabbits and myxoma virus, and flower-pollinator partnerships. Distinguish inherited population change from individual effort, and explain why reciprocal change need not be equal or endless. Subject: Science · Area: Animals of the World · Ages 11 to 12 Page: https://lightmysky.com/learn/science/the-red-queen-hypothesis-mt_mKNmXqz_Oo ## Lesson: The Red Queen Hypothesis The Red Queen in Through the Looking-Glass runs to stay in place. The hypothesis named after her says populations may need ongoing evolutionary change to maintain success as other species evolve. Success means surviving and reproducing. Inherited traits pass from parents to young and can become more common over generations. Animals do not choose new inherited traits because they need them. The hypothesis does not say every species changes all the time. *(drawing: An inherited prey defence can change which hunters leave offspring. A response is possible, not guaranteed.)* Bats locate prey using echoes from their calls. Some moths hear these calls and turn away. Some moths also produce clicks using sound-producing organs. In some species, those clicks disrupt bat echolocation. Ears detect sound; other structures produce the clicks. A moth defence can favour bat traits that improve hunting, such as quieter calls. This is a possible response, not a guaranteed next step. Myxomatosis is a disease caused by myxoma virus. After the virus was introduced to control rabbits in Australia, many infected rabbits died. Inherited resistance became more common as resistant rabbits left more offspring. Virus strains changed too. Here the rabbit is the host and the virus is a parasite. Changes in host resistance can affect selection on the virus, and changes in viral infection traits can affect selection on the host. Mosquitoes and fleas can carry myxoma virus between rabbits. A longer infection can offer more chances for transmission. That does not mean every virus evolves to become harmless or less deadly. Which variants spread depends on the conditions. Viruses do not plan to help their hosts. Evolution concerns differences in which variants spread, not intentions. **Example.** Use subtraction to compare numbers: a rise from 15 to 35 is 35 - 15 = 20. If 12 animals are infected and 4 die, 12 - 4 = 8 survive. Survival alone does not prove inherited resistance. In an invented trial, speeds of 75 and 45 km/h differ by 30 km/h. Turning and terrain also affect a chase, so top speed alone cannot predict escape. Counts alone do not establish what caused a change. Darwin used a Madagascan orchid's deep nectar spur to predict a long-tongued moth. A suitable moth was described later. Nectar feeds the moth, while pollen carried between flowers helps the orchid reproduce. This beneficial partnership can favour changes in both species. Matching shapes alone do not prove how both traits evolved. A deep tube suggests looking for a visitor able to reach its nectar; it does not prove an exact tongue length. Co-evolution means two species evolve because each affects selection in the other. Changing at the same time does not prove that link. A predator can favour prey defences; prey defences can favour predator traits that overcome them. Different interactions can favour different adaptations, adding to biodiversity. Other processes shape variety too. Arms races can slow or end when conditions change. Neither equal changes nor a permanent winner is guaranteed. **Recap.** Other evolving species can change selection pressures. Populations may respond across generations, but equal change, endless escalation and particular outcomes are not guaranteed. *Lesson, questions and flashcards written for this dataset. Numerical trial values are invented teaching examples, not measured animal records.* ## Practice 24 questions on this page, each with its working shown. ## Needs first - [Predator Hunting and Prey Defence Strategies](https://lightmysky.com/learn/science/predator-hunting-and-prey-defence-strategies-mt_Bztatrv-_v) - [Three Kinds of Adaptations](https://lightmysky.com/learn/science/three-kinds-of-adaptations-mt_EaWjCyn8W2) ## Opens up - [Mates, Kin and Animal Strategies](https://lightmysky.com/learn/science/mates-kin-and-animal-strategies-mt_YNrrNE23dZ)