Test your knowledge with these top questions!
Which bird can lay eggs that mimic the color and pattern of a host bird's eggs?
Individual female common cuckoos usually target one host species, matching its eggs' typical colors and patterns.
Which property helps a pollutant biomagnify in food chains?
Some persistent pollutants collect in fatty tissues, so predators receive stored contamination when they eat prey.
Rewetting damaged bogs helps protect which carbon-rich material?
Waterlogged soil has little oxygen, so plant remains decay slowly and carbon stays locked in peat.
Why do wildlife crossings often have fences along the neighboring highway?
Fences alone can make roads a stronger barrier, so crossings give animals a route through that barrier.
Restoring wildflower meadows helps bees perform which job for plants?
A mix of flowers with different blooming times gives bees food for more of the year.
Ants protect aphids in return for which sweet liquid?
Honeydew is sugary waste from aphids, so ants gain food while keeping predators away from their tiny partners.
What happens to much of the sand and silt carried into a beaver pond?
The trapped sediment can help build a meadow if the pond later drains and plants take root.
What service do resident ants give bullhorn acacia trees in return for food and shelter?
Some resident ants also clear neighboring plants, reducing competition for the acacia's sunlight.
Antarctic blue whales feed mainly on which tiny crustaceans?
Krill eat microscopic algae, turning food too small for a blue whale to catch directly into a large meal.
What is the transfer of genes between populations via animals using a wildlife corridor called?
New arrivals can bring gene variants missing from an isolated population, helping reduce inbreeding.