Biologists note that the oxpecker's feeding habits on large mammals can shift between which two types of ecological relationship?

Nature

Which African bird removes ticks and parasites from large mammals like rhinos and buffalo, but sometimes pecks open wounds to drink blood instead?

Oxpecker birds eat parasites off large animals, but sometimes peck open wounds and drink blood—the relationship shifts between helpful and parasitic mid-interaction.

Nature

What popular nickname do scientists sometimes use for the underground mycorrhizal fungal network that lets trees share nutrients with their neighbors?

Mycorrhizal fungi connect tree roots underground, allowing trees to "trade" nutrients with neighbors—even sending carbon to injured trees to heal them.

Nature

Which mammal is known for following the greater honeyguide bird's chattering calls to find wild beehives, then tearing them open for both species to share?

Honey badgers intentionally team up with birds called honeyguide birds—the birds find beehives, badgers break them open, then both share the spoils.

Nature

Which of an octopus's three hearts stops beating while it swims, explaining why it prefers crawling instead?

Octopuses have three hearts: two pump blood to the gills, while the third stops beating when they swim, explaining why they prefer crawling.

Nature

Which animal produces silk strong enough that NASA has researched it as a potential material for lightweight body armour?

Golden silk orb-weaver spider silk has been woven into an actual golden-coloured textile — a full cape displayed at the Victoria and Albert Museum took over a million spiders to produce.

Nature

After coral polyps expel their symbiotic algae during a heatwave, why do they typically begin to starve?

Coral polyps expel their algae partners during heat stress, then starve without them—bleaching is essentially a symbiotic breakup caused by warming oceans.