One look at the Red-legged Honeycreeper and it’s easy to see where it gets its name. Largest of the Cyanerpes honeycreepers at about 12 centimeters long, both male and female Red-legged Honeycreepers sport bright, candy-red legs and a long, sharp bill that’s almost as recognizable as their legs. Males in breeding plumage are a brilliant blue, with azure cap and black wings and tail. Yellow underwing coverts flash conspicuously when the birds are in flight. Females are olive-green above and paler below; males in eclipse plumage resemble the females, but retain their black wings and tails.

The Honeycreeper’s thin, downward-curving bill is an adaptation to nectar-eating, but also allows the Honeycreeper specialized access to fruit and insects. Honeycreepers are able to reach into the narrow cracks of ripening arillate fruit husks to nip bits off the rich arils inside, long before birds with shorter, heavier bills can reach them. In the same way, the bill fits neatly into cracks in tree bark and behind twisting vines to pluck out insects too small and hidden for other birds to find. These tiny insects, in fact, make up the majority of the Red-legged Honeycreeper’s diet.

Common and widespread throughout its range, the Red-legged Honeycreeper is currently not considered threatened. However, “harvesting” of the Red-legged Honeycreeper is allowed in Mexico for part of the year, most likely to supply the pet and caged bird trade.

The Northern Red Bishop, sometimes called the Orange Bishop, is a small songbird found in the grasslands and wetlands of Africa. Some populations have become established in other areas, as well. This species forages in small flocks, primarily eating seeds. Males are a stunning orange. Females are less colorful but have beautiful streaking. Their song is a buzzy “zee-zee-zee” sound.

The Owl Finch, or Double-barred Finch, is a handsome bird from northern and eastern Australia, where it is found in open grassy woodlands, scrublands, forest edge, and grassy vegetation along larger watercourses, as well as more anthropogenic habitats such as cane fields, roadsides, and parks and gardens. Like similar finches, the Owl Finch feeds of grasses and forbs on the ground, but will take more insects during the breeding season. The nest of this finch is a ball with a side entrance, made from grass, lined with soft grasses or feathers, and placed in a bush or small tree. Despite its popularity as a cage bird, the Owl Finch is not threatened.

The Grosbeak Starling, also known as the Finch-billed Myna, is endemic to the island of Sulawesi, Indonesia where it inhabits forest edge and open woodlands. It is also very common in modified habitats such as plantations. The Grosbeak Starling often forages in large groups with other Grosbeak Starlings high in the canopy where it consumes fruits, seeds, insects, and nectar. This species is highly gregarious and also nests colonially. The Grosbeak Starling population in Sulawesi is very seriously impacted by the removal of large remnant trees often used for nesting following logging or land clearing for cultivation. In addition to their attractiveness for the pet trade, some Grosbeak Starlings are killed because of a case of mistaken identity—they are mistaken for a local agricultural pest species, the Short-tailed Starling.

A native of lowland evergreen forest, deciduous and mixed woodland, open forest, and cleared areas with scattered tall trees of India and Indochina, the striking Golden-crested Myna forages for fruit and insects high in the canopy. A cavity nester, this species most frequently utilizes natural holes in trees. Although Golden-crested Mynas are often captured for the pet trade because of their ability to mimic human words and other sounds, this species is not currently considered threatened.

The Golden-breasted Starling is a beautifully colored bird, unmistakable and hard to miss! It inhabits the dry bush and savanna of the arid and semi-arid regions of northeastern Africa. This starling forages mainly on the ground for a variety of insects and some fruits, but termites are a favorite food. This species is a cooperative breeder, meaning multiple birds of the same species participate in the rearing of young. As many as nine helpers can assist at the nest of a pair of Golden-breasted Starlings. The nest itself is placed in a natural cavity in a tree, or in an abandoned barbet nest. The Golden-breasted Starling is not considered threatened at this time.

The Fairy-bluebird lives up to its name: this bird’s plumage is a deep brilliant blue. Males have glossy black feathers on the wings, chest, and tail, and the eyes of both sexes are bright red. Found in tropical forests throughout southeast Asia, the Fairy-bluebird mainly eats fruit, which it takes while perched or snatches from trees mid-flight. This species often joins mixed-species parties of insectivores hunting among foliage; it is observed in flocks of up to ten, but as many as 40 may gather at especially rich food sources. The Fairy-bluebird is not globally threatened and is more or less common throughout most of its range. However, local decreases and disappearances due to hunting, habitat loss, and the cagebird trade may soon require a reassessment and downgrading of its status to Near Threatened or Vulnerable.

The Dhyal Thrush, also called the Oriental Magpie-Robin, is a small songbird found throughout India and southeast Asia. It is the national bird of Bangladesh. The Dhyal Thrush can be found in a variety of habitats including deciduous forest, orchards, cacao plantations, and even in residential village gardens. It has a clear warbling song that can sometimes include mimicry. This species is not globally threatened but is experiencing declines due to the cagebird trade.

The Crested Oropendola inhabits forest edges and clearings in lowland South America east of the Andes Mountains. This species forages mostly in the upper stratum of trees on fruits, insects, and spiders, as well as small vertebrates such as tree frogs. The Crested Oropendola will also take cultivated fruits such as oranges, papayas, and mangos. Crested Oropendolas breed in colonies of 2–40 nests, with a dominant male that does most of the mating. Nests, built by the females, are spectacular pensile (hanging) pouches, open at the top, that may be as long as 5 feet. The Crested Oropendola is regarded as an agricultural pest in fruit orchards and plantations in some areas, and is locally persecuted, but it is not considered threatened.

The White-rumped Shama, also called the Common Shamma Thrush, is native to southeast Asia, India, and some Indonesian islands. This species prefers dense greenery and uses its long tail to change directions easily as it flits about in dense thickets. It has a melodious and complex song and was once thought to be a member of the thrush family Turdidae. The White-rumped Shama was introduced to the Hawaiian Archipelago in 1931 and is now common on the islands of Kaua’i and O’ahu. Unfortunately, in Hawaii, the White-rumped Shama is a reservoir for avian malaria which threatens endemic birds on the islands. While not globally threatened, the illegal wildlife trade has led to marked declines in the species’ population.

When most of us think of the canary, we think of a cheerful, bright yellow bird in a decorative cage. In reality, this common canary (Serinus canaria domestica) is the domesticated cousin of the “true” Island Canary (Serinus canaria), native to the Canary Islands just off the northwest coast of Africa.

Spanish sailors first brought the canary to Europe in 1478, where it was prized among those wealthy enough to afford one for the male canary’s silvery, twittering song. The brilliant yellow color that we associate with modern domestic canaries is the result of a genetic mutation that suppresses the melanin in the birds’ feathers, effectively “erasing” the dark banding and streaking found on wild birds. For the next century, the Spaniards controlled availability of canaries by only selling male birds to the rest of Europe. When a shipping accident in the 16th Century allowed a shipment of the birds to escape to Elba Island in the Tuscan Archipelago, the Italians were quick to take advantage of the situation. Soon canaries were being bred and sold all over the world outside of Spanish control.

The ready availability of domestic canaries made them ideal candidates when, in the late 1890’s, pioneering physiologist John Scott Haldane recommended the use of small, warm-blooded animals as “sentinels” for the build-up of toxic gases in coal mines. A build-up of toxic gases following “firedamp” and coal dust explosions was known to be what killed most miners, but reliable gas detectors were hard to come by. The flame of a “safety lamp” could be used to detect rising levels of methane and “chokedamp” (a combination of gaseous nitrogen and carbon dioxide), but no mechanical means of measuring carbon monoxide existed. With their small body size and faster metabolism, animals such as mice and canaries would succumb to a build-up of carbon monoxide more quickly than a human. Canaries came to be preferred over mice because the birds more visibly demonstrated signs of distress in the presence of even small quantities of carbon monoxide gas. This few minutes of warning gave miners time to put on protective gas masks, or even to leave the mines entirely. In their capacity as sentinels, canaries saved the lives of thousands of miners during the nearly 100 years they were in use. Today, we still use the phrase “the canary in a coal mine” when we talk about species who are biological indicators for the health of an ecosystem – species who, like the canary for the miners, begin to suffer and die as an early sign that something is wrong. Changes in the function, health, or population of these indicator species can reveal such things as the accumulation of pollutants (lamp shell brachiopods), changes in overall air quality (milkweed and some strains of white pine are sensitive to ozone), and the threat of rising ocean temperatures (corals and marine fishes worldwide).

One of the most familiar tanagers of the Neotropics, the Blue-grey Tanager ranges from Mexico south through Central and South America. This species uses a wide variety of non-forest and human-altered habitats, including cacao and coffee plantations, city parks and gardens, and second growth forest and forest edges. Typically seen in pairs, this tanager may join mixed-species flocks while foraging on arthropods and fruit. The nest is a deep cup of rootlets, moss, grass, and other materials, sometimes constructed of materials taken from other tanagers, euphonias, and flycatchers. The Blue-grey Tanager is widespread and abundant, and is not considered threatened.