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Climate Change Threatens Bird Migration in NB
11 Apr
Summary
- 44 bird species in New Brunswick are at risk due to climate change.
- Warming temperatures may cause some birds to leave and others to arrive.
- Changes in migration cues could endanger birds arriving too early.
Warming global temperatures pose a significant threat to bird populations in New Brunswick, with a new report highlighting that 44 species may be at risk. Climate change could lead to shifts in bird distribution, causing some species to leave the province while new ones may arrive. This phenomenon is particularly concerning for insectivores, which rely on specific environmental conditions.
The study suggests that projected warming could impact migration cues such as temperature and rainfall. Birds might receive premature signals to migrate north, potentially leading them into colder snaps and a scarcity of insects, thus decreasing their survival rates. Additionally, shifts in range could introduce new plant species, disrupting existing ecosystems.
Warmer weather has already affected seabirds' ability to find food, and extreme weather events like hot, dry summers with wildfires can destroy essential habitats. Some bird populations, like the boreal chickadee and piping plover, could face a substantial loss of their migratory range if temperatures rise by 3 C above pre-industrial levels.
