Bicknells Thrush

Bicknells Thrush

Latin name: Catharus bicknelli,
Conservsation status: vulnerable (population is decreasing)

One of the rarest birds in North America, the female may have up to four mates at one time.

The breeding habitat of Bicknell's Thrush is primarily restricted to mountain spruce forests of Northeastern US and Canada. They winter in the Caribbean and spring migration north is cued by day length. If spring arrives early in the north and the Thrushes arrive at their normal time, the abundance of food—insects and fruit—would already have peaked. Warming temperatures also produce an abundance of spruce and fir cones—feeding and increasing the population of Red Squirrels, a main predator of eggs and chicks. Storms and hurricanes threaten the Thrush's tropical winter habitat. Pollution, logging and deforestation threaten their spring breeding and winter habitats.


Other animals effected by climate change

Ringed Seal Ringed Seal
All populations of Ringed Seals are expected to be adversely affected by climate change because of dependence on sea ice and snow dens for breeding, protecting pups, moulting and resting. Early warming causes pups to separate prematurely from their mothers. As sea ice declines, other threats are fisheries by-catch, increased shipping, tourism and development. Seals are vulnerable to disease from heavy concentrations of pollutants that have accumulated in the Arctic food web.
Black-footed Albatros Black-footed Albatros
Almost all Black Footed Albatrosses live in the Hawaiian Islands. Like all species of albatrosses that breed on low lying beaches and slopes, they are highly susceptible to sudden flooding from sea level rise and storm surges. Thousands each year are caught by longline fishing and they are also threatened by pollution and ingesting plastics that float in the ocean.
Emperor Penguin Emperor Penguin
In 50 years, the mean temperature of western Antarctica has risen nearly 3 °C—more than any other region—reducing the extent and thickness of winter ice. The Emperor Penguin is dependent on the ice for breeding, raising chicks and moulting. Less sea ice decreases zooplankton (krill) which feed on algae that grow on the underside of the ice. Krill are an important part of the food web for the Emperor and other Antarctic marine species.
Western Glacier Stonefly Western Glacier Stonefly
Since 1960, the average summer temperature in Glacier National Park has increased by around 1 °C and glaciers have declined by 35%. By counting Stoneflies, scientists can determine how quickly glaciers are melting and the temperature of streams. In a two year search begun in 2011, scientists found the Stonefly in only one of the six streams it had previously occupied and discovered that it had retreated to two different streams at higher altitudes. Satellite data confirm that the world’s glaciers are declining, affecting the availability of fresh water for humans, animals and plants, and contributing to sea level rise.

Bicknells Thrushes are effected by climate change because of:The Bicknells Thrush is also threatened by: