Licking bees and pulping trees: The reign of a wasp queen - Kenny Coogan

3,175,814 views ・ 2020-01-28

TED-Ed


Please double-click on the English subtitles below to play the video.

00:06
As the April sun rises on a pile of firewood,
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something royal stirs inside.
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This wasp queen is one of thousands who mated in late autumn
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and hibernated through the winter.
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Now she emerges into the spring air to begin her reign.
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Most of her sisters weren’t so lucky.
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While hibernating in compost piles and underground burrows,
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many sleeping queens were eaten by spiders.
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Warm winters caused by climate change led other queens to emerge early,
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only to find there was no available food.
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And some queens that survived the winter fell victim to the threats of spring,
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such as carnivorous plants, birds, and manmade pesticides.
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Our queen is the lone survivor of her old hive, and now,
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she must become the foundress of a new one.
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But first, breakfast.
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01:01
The queen heads for a citrus grove full of honeybee hives.
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The bees can be dangerous if provoked,
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but right now they’re paralyzed by the morning cold.
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Their hairy bodies are dripping with sugar water from an earlier feeding,
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and the resourceful queen licks them for a morning snack.
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Newly energized, our queen searches for a safe nesting area.
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This tree hollow, safe from rain, wind, and predators, is ideal.
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She chews the surrounding wood and plant fibers
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to make a paper-like pulp.
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Then she builds around 50 brood cells that comprise the beginning of her nest.
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Using sperm stored from last fall,
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the queen lays a fertilized egg into each cell,
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producing as many as 12 in 20 minutes.
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Within a week, these will hatch into female larva.
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But until then, the queen must hunt down smaller insects to feed her brood,
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all while expanding the hive, laying eggs, and defending against intruders.
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Fortunately, our queen is well prepared.
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Unlike bees, wasps can sting as many times as they need to.
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With such a busy schedule, the queen barely has time to feed herself.
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Luckily, she doesn’t have to.
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When she feeds an insect to her grubs,
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they digest the bug into a sugary substance that sustains their mother.
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By the end of July, these first larva have matured into adult workers,
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ready to take on foraging, building, and defense.
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The queen can now lay eggs full-time,
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sustaining herself on her worker’s spoils and their unfertilized eggs.
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Although each worker only lives for roughly 3 weeks,
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the queen’s continuous egg-laying swells their ranks.
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In just one summer, the nest reaches the size of a basketball,
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supporting thousands of workers.
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Such a large population needs to eat,
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and the nearby garden provides a veritable buffet.
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As the swarm descends, alarmed humans try to swat them.
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They even fight back with pesticides that purposefully poison wasps,
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and inadvertently impact a wide-range of local wildlife.
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But the wasps are actually vital to this ecosystem.
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Sitting at the top of the local invertebrate food chain,
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these insects keep spiders, mites, and centipedes, in check.
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Wasps consume crop-eating insects,
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making them particularly helpful for farms and gardens.
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They even pollinate fruits and vegetables,
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and help winemakers by biting into their grapes
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and jump-starting fermentation.
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This feast continues until autumn, when the foundress changes course.
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She begins grooming some eggs into a new generation of queens,
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while also laying unfertilized eggs
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that will mature into reproductive males called drones.
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This new crop of queens and males requires more food.
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But with summer over, the usual sources run dry,
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and the foraging wasps start taking more aggressive risks.
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By September, the hive’s organization deteriorates.
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Hungry workers no longer clean the nest and various scavengers move in.
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Just when it seems the hive can no longer sustain itself,
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the fertile queens and their drones depart in a massive swarm.
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As the days grow colder, the workers starve,
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and our queen reaches the end of her lifespan.
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But above, a swarm of reproductive wasps has successfully mated.
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The males die off shortly after,
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but the newly fertilized queens are ready to find shelter for their long sleep.
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And this woodpile looks like the perfect place to spend the winter.
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