The Puerto Rican Bullfinch, also known as the Puerto Rican Tanager, is a small bird that belongs to the tanager family. It is endemic to the island of Puerto Rico, and its scientific name is Loxigilla portoricensis. This bird is approximately 6.3 inches (16 cm) long and weighs around 0.63 ounces (18 grams).

The Puerto Rican Bullfinch has several distinguishing field marks. The male bird has a black head, throat, and upper breast, while the rest of its body is a vibrant red color. It has a small, conical bill that is black in color. The female bird is less vibrant and has an olive-green head and upper body. Its underparts are a yellowish-green color, and it also has a small, conical black bill.

This species of bird is non-migratory and is found throughout Puerto Rico, from the lowlands to the mountains. It is commonly found in forested areas, but it can also be seen in parks, gardens, and other open areas with trees. The Puerto Rican Bullfinch is a shy bird and is often heard before it is seen. It has a distinctive, high-pitched song that sounds like “see-see-see” or “twee-twee-twee.”

The Puerto Rican Bullfinch is an omnivore, feeding on insects, fruits, and nectar. It is known to eat small insects, spiders, and caterpillars, as well as fruits such as bananas, papayas, and guavas. This bird is also important for pollination in Puerto Rico, as it feeds on nectar from flowers.

Due to habitat loss, the Puerto Rican Bullfinch is considered a species of concern by the International Union for Conservation of Nature (IUCN). The population is estimated to be around 100,000 individuals, and conservation efforts are in place to protect its habitat and promote breeding. The Puerto Rican Bullfinch is an important part of Puerto Rico’s natural heritage and serves as a symbol of the island’s biodiversity.