[1] Batrachostomus occur from India and Sri Lanka, across mainland southeast Asia and as far as Borneo, Java, and Sumatra.

[3] The English zoologist, curator of the Museum of the Asiatic Society of Bengal (Calcutta), and collector Edward Blyth (1810–1873) gave his name to B.

[3] DNA-DNA hybridization data from 1988 suggested that species in Batrachostomus are distantly related to the Podargus ones and should therefore be placed in a new separate family, the Batrachostomidae.

All frogmouths were previously in the order Caprimulgiformes, but a 2019 study determined that Podargus and Batrachostomus diverged from one another between 30 and 50 million years ago, and were consequently forming their own clade separate from nightjars.

[3] All three were also sometimes considered as being the conspecifics of Hodgson’s frogmouth (B. hodgsoni), but size and structure differences of the bill, facial bristles, tail, bare-parts, and vocalizations were too great to approve this assumption.

[4] The birds are brownish or rufescent brown and lack white markings on wings and tail, however, the female is usually browner and more plain than males.

[2][4] Like the other frogmouth species, Blyth’s has well developed stiff facial bristles and longer black or dark-coloured ones that cover the ears called “auricular plumes”.

Juveniles have a soft-textured plumage and differ from the adult males by their coloration that has more rufous tones, and their upperparts have more dark barring and no spot.

[6] Like other Batrachostomus species, the Blyth’s frogmouth has a large tail compared to its body size, which helps for maneuverability.

The Blyth’s frogmouth, like other genera in the family, tends to look like owls (Strigidae), but differs from them by its lack of strong claws on the toes.

[7] Batrachostomus, including the Blyth’s frogmouth, are found from India and Sri Lanka to as far as Borneo, Java, and Sumatra.

Records of the Blyth’s frogmouth also exist in Peninsular Malaysia near swampy jungles and in lower storeys of forests in lowlands and hills.

[3] Although detailed breeding information for Blyth's frogmouth is limited, family and genus-level observations can still offer valuable insights into their behaviour and ecology.

[1][3] They usually build small nests made of bark, cobwebs, hair, moss, lichen, and other plant matter.

[1] The cup-shaped nests are extremely small and shallow, with observations of five Batrachostomus species suggesting they can hold only a single-egg.

Some suggest that the egg only stays in place in the nest from the constant presence of an incubating bird, which adopts a half-upright posture.

B. a. affinis (in Thailand and Sumatra) and B. a. continentalis males can give plaintive whistles that are low pitched in the middle.

B. a. affinis males can also do long rapid series of quit and single gwaa that are described as “barks” or “quiet frog-like croaks”.

The stomach content of 20 specimens from Java included beetles, grasshoppers, earwigs, caterpillars, moths, cockroaches, termites, ants, cicadas, crickets, a yellow butterfly, and a gastropod mollusc with a flat shell.