Black Redstart Diet and Size: Feeding Habits, Predators, and Measurements
Black Redstarts are small passerines which are easily recognisable by their deep grey or black body which is contrasted by a bright red tail and rump. Females are more subdued with grey-brown colourings but still share that vivid red tail.
Their original habitat consisted of mountainous regions and rocky outcrops, but these highly adaptable birds are often found in dilapidated buildings, sea cliffs, quarries and many urban settings as well. This adaptability has led to a fairly widespread distribution of Black Redstarts all across Europe and Asia.
In this article, we’ll be looking at their diet, breeding habits, size and weight as well as their conservation status and much more. Keep reading to find out all about these fascinating birds.
Table of Contents
The Dietary Habits Of The Black Redstart
Black Redstarts are insectivores with a varied diet, primarily feeding on insects and other small invertebrates. They often catch insects straight out of the air as they are flying.
Whilst at other times, they remain motionless on their perches waiting for insects to get close enough.
What Does A Black Redstart Eat?
They mainly eat insects including; beetles, flies, ants, caterpillars, grasshoppers, and spiders. They will also eat worms, small molluscs like slugs and other small creatures.
During colder months, especially in autumn and winter when insects are scarce, Black Redstarts supplement their diet with berries, fruits, and seeds.
What To Feed A Baby Black Redstart?
When feeding their chicks, Black Redstarts focus on providing them with protein-rich, easily digestible food like caterpillars, small beetles, worms, spiders and flies.
The chicks need high protein foods to enable them to grow and develop quickly. Their parents frequently hunt and bring back soft-bodied insects to keep up with the constant hunger of the young chicks.
Breeding Habits Of Black Redstarts
The breeding season for Black Redstarts typically runs from April to July, though it can vary slightly depending on their location. Males are known for their distinctive and rather scratchy songs, which they use to mark their territory and attract females. They often sing from prominent perches like rooftops, tree branches, or rocks.
During courtship, males engage in a unique display by flicking their wings and quivering their reddish tails. They also perform brief aerial flights, often accompanied by singing, to impress potential mates. These displays are typically short but take a lot of energy, showcasing the male’s fitness.
Males aggressively defend their breeding territory, chasing away other males. Establishing a territory and showing dominance is a key part of attracting females.
The female builds the nest and incubates the eggs whilst the male is on hand to defend his territory and bring food to the female. Once the eggs hatch, both parents are involved in feeding and caring for the young chicks.
Do Black Redstarts Mate For Life?
Black Redstarts usually mate for life although in some cases the partnership will include a second female. The male will aggressively defend his mate with varying levels of aggression.
She will also defend her chicks and both parents are responsible for feeding and caring for the young chicks.
The Size & Weight Of Black Redstarts
Black Redstarts are small passerines similar in size to the European Robin.
How Much Does A Black Redstart Weigh?
The typical weight of an adult Black Redstart is around 13 to 20 grams. Males and females are typically similar in size and weight although males can be slightly larger and heavier depending on the time of year.
Many females gain weight when carrying eggs and both males and females will build up their fat content before they engage on their migratory journeys.
How Big Is A Black Redstart?
The average length of an adult Black Redstart is around 14 cm with an average wingspan of around 22 to 26 cm. This relatively small size and weight allows the Black Redstart to easily manoeuvre around their chosen habitat in pursuit of their insect prey.
Are Black Redstarts Under Threat?
Black Redstarts are not currently considered to be under any significant threat. The IUCN Red List classifies them as a species of Least Concern due to their wide range and stable population trends across Europe, Asia, and parts of North Africa.
In the UK however, they are Amber Listed on the UK Birds of Conservation Concern list. They face threats globally due to habitat loss caused by urban development and changes of land usage.
This can be because of building projects, agricultural expansion or the destruction of natural environments like rocky areas or old buildings. Black Redstarts are also susceptible to food shortages caused by the use of pesticides and insecticides.
Climate change also plays a part in potential threats to Black Redstarts by potentially altering their migratory habits and food supplies during the breeding season.
What Eats A Black Redstart?
Black Redstarts also face the threat from predators including birds of prey like Sparrowhawks, Kestrels and hawks which will take adult birds as they search for food.
Crows and Magpies are known to take eggs and chicks from nests. Whilst stoats, weasels, foxes, rats and cats are known to take eggs, chicks and fledglings. In some areas, snakes also prey on chicks and eggs.
Despite these threats, the adaptability of Black Redstarts, particularly in urban environments, helps maintain their population stability across most of their range.
Where Can I See Black Redstarts In The UK?
In the UK, Black Redstarts can be found in a number of urban and industrial areas, as well as in some rural regions. Their population is relatively small, with an estimated 100 breeding pairs but that number swells during winter when European birds fly south to escape the colder winter temperatures.
They are often spotted on industrial buildings, building sites and brownfield sites. Some sightings are spotted in urban areas like;
- London
- Birmingham
- Bristol
- Liverpool
As well as coastal areas like;
- Brighton (sussex)
- Eastbourne (Sussex)
- Dungeness (Kent)
As well as some rare sightings on power stations in coastal areas of Suffolk and Essex. With many Black Redstarts flying into southern and eastern areas of England during winter.
SEE ALSO: Ptarmigan Life Cycle: Nest Building To Fledging (and everything in between)
Frequently Asked Questions
Black Redstarts prefer rocky or urban environments, often nesting in old buildings, construction sites, cliffs, and quarries. In cities, they thrive in post-industrial areas and urban landscapes that resemble their natural habitat of rocky outcrops.
Black Redstarts are mainly insectivores, feeding on insects such as beetles, flies, caterpillars, and spiders. In colder months, they may also eat berries and seeds when insects are scarce.
Black Redstarts are partially migratory. In northern parts of their range, such as the UK, they may migrate to warmer areas in Europe during winter. In more temperate or southern regions, they may stay year-round.
