The avifauna of Puerto Rico included a total of 385 species as of July 2022, according to Bird Checklists of the World. Of them, 201 are accidental, two have been extirpated, and one is believed to be extinct. Seventeen species are endemic. Non-native species are common; 43 listed here were introduced by humans. Individuals of many other species (mostly parrots, finches, and waxbills) are flying free, presumably after escaping or being released from captivity. For example, a 2018 study on introduced Psittacidae on the island found at least 46 species present, of which 24% are only found in the pet trade (captivity), 48% have been observed in the wild (but are not known to be breeding), and 28% are established (naturalized) and know to have bred or are currently breeding. Around 120 species breed in Puerto Rico while the majority of the others overwinter in the archipelago.
