[2] "The Cuban gnatcatcher was described by the most famous of this island’s ornithologists, the naturalised Juan (Johannes) Gundlach".

[2] The Cuban gnatcatcher is 10 to 11 cm (3.9 to 4.3 in) long and weighs 4.5 to 5 g (0.16 to 0.18 oz) and is among the smallest members of genus Polioptila.

Its nest is a deep cup constructed by both sexes using hair, vegetable fibers, and small leaves and lined with softer material.

[3] In a detailed study cited by Atwood et al (2020), 35 of 38 clutches were predated before the young fledged.

[4] The Cuban gnatcatcher's song is "a sustained rambling, disorganized series of warbles, whistles and chattering notes" [1].