Introduction
In the estuarine beaches of the Potiguar Basin, in Rio Grande do Norte, the red-knot (Calidris canutus) prepares for its long migratory journey. With the goal of feeding and doubling its weight, these birds face challenges such as sea level rise, litter, and heat.
The Migratory Cycle
The red-knots live for about eight months between the coastal wetlands of the Brazilian coast and Tierra del Fuego, in the southernmost part of South America. In May, they begin their return flight to the Northern Hemisphere, heading to the cold and desert regions of the Arctic tundra.
This journey is one of the longest among migratory birds, with around 8,000 kilometers traveled without sleeping, eating, or drinking. Before departing, the birds display the reddish coloration on their chest, typical of nuptial plumage.
Environmental Challenges
In addition to natural challenges, migratory birds face environmental problems such as sea level rise, litter, and heat. The rise in sea levels due to climate change is affecting the habitats of these birds, while litter and pollution are compromising the quality of water and soil.
Heat is also an important factor, as birds need to adapt to increasingly high temperatures during their journey. This can affect their ability to feed and hydrate, making migration even more challenging.
Consequences and Solutions
The consequences of sea level rise, litter, and heat for migratory birds are severe and can affect the population of these species. It is essential that measures be taken to mitigate these effects, such as protecting habitats, reducing litter, and conserving biodiversity.
Furthermore, it is crucial to promote awareness about the importance of conserving migratory birds and their habitats, as well as supporting research and conservation initiatives.
Conclusion
Migratory birds in Brazil face significant challenges due to sea level rise, litter, and heat. It is essential that measures be taken to protect these species and their habitats, ensuring the continuation of migration and biodiversity.
Source / Reference: Mongabay