Goldcrest

Quick Take

• Britain's tiniest bird faces a winter survival rate so brutal it should wipe the species out, yet somehow the goldcrest bounces back every single year. See the mortality data →
• The goldcrest has a call, but chances are you've never heard it, and there is a biological reason why most people never will. Explore the goldcrest's call →
• Its name translates to 'little king,' and the male's hidden crown plays a central role in everything from winning a mate to claiming territory. Discover the name's meaning →
• A bird the weight of a coin somehow survives in the Himalayas, and the adaptation behind it is less obvious than you'd expect. See cold-weather survival habits →

The goldcrest is a tiny bird and the smallest in the United Kingdom, measuring 3.4 inches and only weighing 0.19 ounces, which is equivalent to a nickel. Goldcrests are dull-looking birds with a greyish-green plumage, and the only striking feature is the fiery orange stripe along their heads.

It’s hard to differentiate between males and females, but one significant difference is the crown on the males’ heads, which is more prominent than that of females and used during their mating rituals. For example, the male goldcrest will bow its head and show off its colored crest to attract a mate.

Goldcrests occur in the UK throughout the year and are often sighted meandering in pine forests and gardens during winter. These birds enjoy the mountains and can survive in woodlands as high as 9,800 feet. These brave little birds can adapt to most situations and even inhabit specific areas in the Himalayas and the Sea of Japan.

Where to Find the Goldcrest

Goldcrests are widespread across Europe, Asia, and parts of North Africa. They are found year-round or during breeding seasons across the temperate regions of Europe, the UK, Scandinavia, Russia, and extending into parts of Asia and Japan.

The northern populations will head south once it starts getting colder. Goldcrests are partly migratory, and those living in the north will migrate south for winter and can travel around 620 miles in seven days.

When mating season comes around, goldcrests prefer areas with conifers and mixed woodlands. This could include gardens and parks that contain conifers. However, they prefer deciduous trees and scrub outside of the mating season.

Because they’re so tiny, goldcrests are found closer to the ground because it’s warmer. But, during the warmer months, they prefer living higher up in the canopy.

Nests

They build their nests relatively high in trees, up to 49 feet. Their nests consist of 3 layers: the first is moss interwoven with spider webs, which is attached firmly to the tree branches. The middle consists of moss, and the inner layer is lined with feathers and hair.

Classification and Scientific Name

Their scientific name is Regulus regulus, but its striking yellow crest is the reason behind its common name, goldcrest. Regulus is derived from the Latin rex, meaning ‘little king,’ a diminutive of rex, meaning ‘king’ or ‘ruler.’

The goldcrest belongs to the Order Passeriformes, which consists of more than half of all bird species. Another name for these passerines is perching birds, and they are recognized by the arrangement of their toes, with three facing forward and one pointing back, facilitating perching.

Goldcrests are members of the Regulidae family, which were formerly classified with the Old World Warblers. Regulus is Latin for “king” or “prince,” which is a tribute to the adults’ colored crowns.

This tiny bird has 14 subspecies, all with very similar characteristics but differing in minute details like the shade of their plumage.

Size and Appearance

The goldcrest is tiny and claims the spot of the smallest bird in Europe. Measuring only 3.3 to 3.7 inches in length and weighing a meager 0.16 to 0.25 oz, it has a wingspan of 5.3 to 6.1 inches.

The adult males have predominantly olive-green upper parts with tinged-green bellies. Their crowns are bright yellow, with black edges on either side. The black edges extend from the top of the crown to the base of the upper mandible.

When the yellow crown is erect, you can clearly see the orange hue of the feathers beneath it. They have creamy white areas below the eyes and chin, and a thin black line extends from either side of the bill, forming a “mustache.”

They have dark brown or black narrow bills with dark brown eyes. In addition, their legs are also brown. The females are very similar, except for the orange feathers underneath the yellow crown.

Juveniles aren’t as colorful as the adults; they are much duller with white rings around their eyes. In addition, they are missing the bright yellow crown. While their subspecies are very similar in most aspects, they differ in patterns and coloration.

Migration Pattern and Timing

Goldcrests migrate in winter and dominate the skies of Scandinavia, with flocks from abroad joining resident birds for the annual migration to Britain. Generally, there are around 610,000 breeding pairs in the United Kingdom. However, this number significantly increases to about five million individuals during the colder months.

Despite the migration to get away from freezing temperatures, Goldcrests are still susceptible to the elements, and usually, only one-tenth of the population survives the cold winter.

It’s not only the cold climate that affects these tiny birds; the temperature affects the natural supply of insects, starving a considerable percentage of the goldcrest population. Although these declines seem terrible, goldcrests can easily replenish their numbers in a short amount of time.

Behavior

Goldcrests are diurnal and very energetic; they can flap their wings extremely fast and enjoy hopping and jumping among sticks and branches in a jerking motion, giving them a remarkably fierce appearance, very similar to the wren.

When hidden from sight amongst the dense foliage, goldcrests are recognized by their call, which is a high-pitched “zi-zi-zi” noise. However, this noise is too high-pitched for most humans’ hearing range.

They use their pointed bill to poke into bark crevices and other tight spots to find prey, and will often hang upside down. In addition, they love to scavenge through leaves to gather insects.

They live in small groups and display erratic behavior during colder months, often joining sedentary colonies of birds of their own species.

They can fly long distances when migrating, but harsh weather can end their journey instantly. So during winter, goldcrests like to roost together at night in thick vegetation, huddled up together for warmth.

Diet

Although they are small, Goldcrests are avid eaters and enjoy a wide variety of food. They have narrow pointed beaks, which work as an effective instrument to pick out insects from the bark of trees and dense pine needles.

They enjoy eating spiders, moth eggs, caterpillars, flies, springtails, and other insects.

Although they are insectivores, they also eat seeds from the ground in winter. However, they will never eat bird seed mixes, peanuts, and sunflower hearts from feeders. Instead, they will search for food under leaves or from the upper surfaces of branches in coniferous habitats. Goldcrests are avid hunters and have a unique ability to catch insects while hovering.

Reproduction

Goldcrests mate for life and live in monogamous pairs. Males initiate their mating rituals in late April or early May, singing to mark their territory and attract a suitable mate. They also raise their crowns, displaying the bright orange feathers beneath the crest.

A tall conifer can house several breeding pairs at different levels of the tree, meaning there are various territories in one tree. Males build their nests on the tree’s outer branches, and they mold them into the shape of a hammock.

The female generally lays 6 to 14 pale, smooth eggs covered in several markings, and she lays one egg per day. She will incubate her eggs alone, while the male will bring her food during this time. Once they hatch, both parents will feed the chicks, who fledge at around 17 to 22 days.

Lifespan

on average, a goldcrest only survives for one or two years in the wild. However, the longest lifespan on record in the wild is 7 years. Therefore, they could probably live even longer in captivity. Unfortunately, there is no data on record about their lifespans in captivity.

Predators, Threats, and Conservation Status

The goldcrest’s main predator is the Eurasian Sparrowhawk. However, they have many enemies, which include:

• Merlins
• Tawny Owls
• Long-eared Owls

To avoid being caught, goldcrests exhibit erratic flight patterns and sharp movements.

Goldcrests also play host to mite species, louse and fleas.

Goldcrests have large populations in their range; their most significant threat is the weather. Severe winters kill thousands of goldcrests each year. However, they are prolific little birds, and their populations recover quickly.

These tiny birds are listed as Least Concern on IUCN’s Redlist, but their population has declined over the past few years. Unfortunately, no protective measures are in place to help them regain their numbers.

Population

Currently, the goldcrest population is estimated to be between 98 and 165 million mature individuals, with 20,000,000 to 37,000,000 pairs in Europe alone. During migration seasons, the Royal Society for the Protection of Birds reports a whopping 3 to 5 million birds in the United Kingdom alone.

Although these numbers seem ridiculously high, their populations have declined significantly over the years.

Communication

The males attract females with a signature courtship song, which is sung in a high-pitched tone during foraging. However, they generally communicate with a high-pitched “zee-zee-ee” call.

Males have multiple territorial songs as well. Many variations in the song of Micronesian populations have been useful for identifying subspecies and studying the distribution of goldcrests across the islands.

They play a significant role in their ecosystems as seed dispersers; and help control the populations of insects they eat.