You can follow him on Twitter at your thoughts on this article, and others, on our Instagram, Facebook and Twitter pages. Contact him at any questions or comments about his article. David Frey is managing editor at The Wildlife Society. “If the climate warms, the ideal time for breeding might be much earlier.” If they can’t identify those changes, Gow said, it could have ramifications throughout their migration cycle. “The birds will start breeding the second week of May,” she said. Weather changes could impact departure times and the abundance of prey along the way, she said. A delay in reaching their breeding times could give them less time to breed and put them at risk of nest predators.īut the wintering grounds give them a chance to reset for the next cycle, they found.Īlthough their research did not directly study climate change, Gow said, their findings suggest that it could impact the birds. “When we see a bird in the summer sitting on a fencepost, raising their young, the timing of activities can influence when they arrive at winter stopover sites and tropical wintering grounds.”Ī delay at their breeding grounds - a storm, a change in habitat - could lead to a late arrival at their wintering grounds, creating a danger that they won’t find adequate food when they arrive. “The timing of when a bird breeds has cascading events that happen thousands of kilometers away from the breeding grounds,” Gow said. Outfitting over 130 birds with light-level geolocators weighing less than a gram, they were able to track how long the birds spent at the breeding grounds to raise their young, when they departed for points south, where they stopped to refuel and when they arrived at their wintering grounds.Įach step along the journey can have ramifications for the rest of the migration cycle, they found. Researchers say this study was the first to track the timing of 12 distinct populations across the continent. Previous studies followed a single population of the bird, which breeds throughout Canada and the northern United States and migrates to southern states, Mexico and the Caribbean. “If we want to understand the decline of the birds, we need to understand how they behave and where they go at different scales,” said Gow, lead author of the study published in the Proceedings of the Royal Society B. The findings shed light on how to conserve the birds, whose numbers are dwindling. They found that a delay at one point in the migration can have ripple effects throughout the cycle, but at their wintering grounds, the birds have a chance to reset the clock. But improvements in technology allowed biologists to fit tiny tree swallows ( Tachycineta bicolor)with even tinier GPS “backpacks,” allowing them to paint a vivid picture of the birds’ 3,500-kilometer migration across North America. ©Elizabeth GowĪ few years ago, University of Guelph researcher Elizabeth Gow’s work wouldn’t have been possible. LINK48 at Pitchers Complex, 12 Alder Road, Londonderry BT48 8RY. Find us To navigate, press the arrow keys. To learn more, see the privacy policy.Researchers tracked tree swallows across their 3,500-kilometer migration. Saturday: 12 Noon Late Sunday: 12 Noon Late. Please note that Urban Thesaurus uses third party scripts (such as Google Analytics and advertisements) which use cookies. Special thanks to the contributors of the open-source code that was used in this project: and you might like to check out the growing collection of curated slang words for different topics over at Slangpedia. There is still lots of work to be done to get this slang thesaurus to give consistently good results, but I think it's at the stage where it could be useful to people, which is why I released it. Please also note that due to the nature of the internet (and especially UD), there will often be many terrible and offensive terms in the results. Or you might try boyfriend or girlfriend to get words that can mean either one of these (e.g. The search algorithm handles phrases and strings of words quite well, so for example if you want words that are related to lol and rofl you can type in lol rofl and it should give you a pile of related slang terms. The higher the terms are in the list, the more likely that they're relevant to the word or phrase that you searched for. Note that this thesaurus is not in any way affiliated with Urban Dictionary.ĭue to the way the algorithm works, the thesaurus gives you mostly related slang words, rather than exact synonyms. The official Urban Dictionary API is used to show the hover-definitions. These indexes are then used to find usage correlations between slang terms. The Urban Thesaurus was created by indexing millions of different slang terms which are defined on sites like Urban Dictionary.
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