Agriculture
Springing forward
Seeds of the Future
Vitamin D-licious Mushrooms
Amphibians
Toads
Salamanders
Poison Dart Frogs
Animals
Fishy Cleaners
Blotchy Face, Big-Time Wasp
Eyes on the Depths
Behavior
Monkeys in the Mirror
Longer lives for wild elephants
Flower family knows its roots
Birds
Finches
Storks
Crows
Chemistry and Materials
Watching out for vultures
A Butterfly's Electric Glow
Cooking Up Superhard Diamonds
Computers
The Shape of the Internet
A Classroom of the Mind
Galaxies on the go
Dinosaurs and Fossils
Supersight for a Dino King
Big Fish in Ancient Waters
Dino-bite!
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
Vitamin D-licious Mushrooms
Farms sprout in cities
What is groundwater
Environment
Plant Gas
Food Web Woes
Swimming with Sharks and Stingrays
Finding the Past
Words of the Distant Past
Untangling Human Origins
Prehistoric Trips to the Dentist
Fish
Cleaning Up Fish Farms
Nurse Sharks
Bull Sharks
Food and Nutrition
Yummy bugs
The Essence of Celery
Eat Out, Eat Smart
GSAT English Rules
Who vs. Whom
Who vs. That vs. Which
Whoever vs. Whomever
GSAT Exam Preparation Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Exams Jamaica Scholarships
GSAT stars reap scholarship glory
Access denied - Disabled boy aces GSAT
GSAT Scholarship
GSAT Mathematics
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
How to Slice a Cake Fairly
Prime Time for Cicadas
Human Body
Attacking Asthma
Workouts: Does Stretching Help?
Heart Revival
Invertebrates
Camel Spiders
Snails
Spiders
Mammals
Sphinxes
Pugs
Doberman Pinschers
Parents
Raise a Lifelong Reader by Reading Aloud
Children and Media
What Not to Say to Emerging Readers
Physics
Black Hole Journey
Extra Strings for New Sounds
Gaining a Swift Lift
Plants
Fungus Hunt
Surprise Visitor
Underwater Jungles
Reptiles
Rattlesnakes
Iguanas
Anacondas
Space and Astronomy
Unveiling Titan
Cool as a Jupiter
Killers from Outer Space
Technology and Engineering
Switchable Lenses Improve Vision
Shape Shifting
A Light Delay
The Parts of Speech
What is a Preposition?
Adjectives and Adverbs
What is a Noun
Transportation
Morphing a Wing to Save Fuel
Tinkering With the Basic Bike
Reach for the Sky
Weather
The solar system's biggest junkyard
Arctic Melt
Earth's Poles in Peril
Add your Article

Revenge of the Cowbirds

Cowbirds are famous for their wily ways. These North American birds sneak into the nests of other birds, lay their eggs, and quickly escape before the owners return. They don't do any of the hard work it takes to raise chicks. Instead, they leave the parenting to the nest's owners. Given cowbirds' reputation, that's not totally surprising. But here's what might come as a shock. Even though the birds that live in these nests don't belong to the cowbird species, most of them adopt the big, hungry cowbird chicks and raise them as their own. Scientists have long wondered why the new parents raise the greedy chicks. New evidence now suggests that sometimes the birds have little choice. If they kick the moocher chicks out of the nest, the cowbird parents seek revenge. For a decade, researchers from the Illinois Natural History Survey in Champaign and the Florida Museum of Natural History in Gainesville have been monitoring warbler nests in boxes in southern Illinois. During that time, they often saw cowbird eggs in the warbler nests. The nest boxes sit on poles that the scientists have covered with grease to protect the eggs and chicks from raccoons, snakes, and other predators. Then, in 2002, the scientists tried something new. They removed the cowbird eggs from the warbler nests. Suddenly, unknown attackers started to destroy warbler eggs. But the damage wasn't evenly spread among the nests. The scientists found that that warbler eggs were damaged in only 6 percent of nests that held cowbird eggs. A whopping 56 percent of the warbler eggs were destroyed in the nests from which the scientists had removed cowbird eggs. The scientists suspected that the cowbirds might be the culprits, but they needed to prove it. To do so, they removed cowbird eggs from the nests and then changed the entrance hole to keep the cowbirds from returning. When the suspected attackers couldn't get into the nests, the warbler eggs remained untouched. Cowbirds, researchers concluded, are like mafia members: If a warbler doesn't give them what they want and raise their chicks, the parent retaliates. It's a tough balance for the warblers. When their nests are invaded, cowbird chicks eat so much food that some warbler chicks starve. Still, the scientists say, more warbler chicks survived in this group of nests than in the group where researchers removed the cowbird eggs. Too many of those nests were attacked by vengeful cowbird parents. Sometimes, this study suggests, it's better to put up with a bully than to try to fight back.E. Sohn

Revenge of the Cowbirds
Revenge of the Cowbirds








Designed and Powered by HBJamaica.com™