For example,
Song moucherolle czeubé threatened alberta:
The Moucherolle Tchébec, a small Alberta bird, changes its annual migration to the south. However, Researchers attribute this change to climate change and worry about this fragile species as well as other migratory species.
According to a new study published last month in The Wilson Journal of Ornithology . In addition, conducted in partnership with the Observatory of Birds of Beaverhill, Near Edmonton, the Czech Adult Moucherolles are now leaving two weeks earlier in the fall, compared to 32 years ago.
Geoffrey Holroyd. Furthermore, co -author of the study and president of the observatory, stresses that, thanks to three decades of data, this significant change was observed.
Adults are now leaving two weeks earlier than 30 years ago.. Moreover,
This little insectivorous bird, the smallest of its kind in North America, reproduces in Alberta and passes its winters in Mexico and Central America.
A warning for other species
Geoffrey Holroyd claims that this migration behavior change in the Czech Moucherolle is considered a warning for thousands of other migratory birds that run hundreds. Similarly, sometimes thousands of kilometers each year.
The Azurea Merlebleu is one of the species that show trends similar to the Czech Moucherolle.
Photo : Radio-Canada / David Gray
Researchers have already noted similar trends in other species. Furthermore, such as the Azurea merleble and the little NYCTAL.
Researchers believe that birds are based on factors such as sunlight. weather and health of their habitat to decide to leave.
However, climate change disrupts these delicate calculations.
When these critical cycles are offset. birds may no longer be synchronized with the essential resources for their survival, underlines Geoffrey Holroyd.
Early migration can expose them to deadly storms. and extreme heat during the hatching season can prevent young people from surviving.
No clear explanation
Geoffrey Holroyd specifies that researchers think that Moucherolles arrive earlier in the spring. which allows them song moucherolle czeubé threatened alberta to leave earlier.
He argues that there are many questions about the viability of bird species threatened by climate change. insists on the importance of reducing the impact of humans on these populations.
The next step is to explore our 30 years of data. determine the reasons. Why can adults leave two weeks earlier? Do they arrive earlier? Do they nest earlier?
The study also revealed differences in synchronization between birds: adults migrate 13 days before young people who hatched the same year, and adult females leave 5 days earlier than adult males.
Geoffrey Holroyd explains that males stay longer to defend their territory. while young people need more time to song moucherolle czeubé threatened alberta perfect their insect hunting skills before leaving south.
Once they have finished nesting. adults leave immediately, because they want to go to their wintering place to turn their feathers. But young people are not in a hurry
he specifies.
The Czerated Moucherolles have nests grouped together in territories across Canada. from Yukon and Northwest Territories to the United States border to the south and East Newfoundland.
Photo: Photo: Emma gracefulity on the side
A species already in decline
Olive. gray in color with a scope of about 20 centimeters, the Moucherolle Tchébec is known for its incessant song in summer.
Its population has decreased by 54 % since the early 1970s, according to federal surveys on nesting birds. The species is classified as in high decline
par Partners in Flightwhich focuses on the. conservation of species of terrestrial birds.
La North American Bird Conservation Initiative considers it as a priority species
.
Jeff Skevington, ornithologist researcher and president of theOntario Field Ornithologistsindicates that this study is an important step.
He insists that observatories like that of Beaverhill are essential to follow these complex changes.
According to information from Wallis Snowdon
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