American Cliff Swallow
Petrochelidon pyrrhonota
The cliff swallow's average body length is 13 cm (5.1 in), and they have short legs and small bills with relatively long pointed wings. Adult cliff swallows have an overall dark brownish plumage covering both their back and wings, and they have a characteristic white forehead, rich red-coloured cheeks with a dark throat, basic white underparts and a buffy-coloured rump. In good lighting conditions, their crowns and mantle feathers are iridescent. Voice: The social structure of these cliff swallow colonies has evolved a complex vocalisation system. Five vocalisations have been identified, which are used by both juveniles and adults for different reasons. These vocalisations are structurally similar across the age groups and can be described as begging, alarm, recognition, and squeak calls, all with some variations.
ID text from Wikipedia, CC BY-SA 4.0
Tree Martin
Petrochelidon nigricans
The tree martin averages 13 cm (5.1 in) in length and has a shallowly forked tail. The adult has an iridescent blue back and crown, brown wings and tail, a rufous forehead and a whitish rump. The underparts are white. The sexes are similar, but young birds are duller and browner, with a paler forehead and pale fringes to the back and wing feathers. The call of this vocal swallow is a tsweet and the song is a high-pitched twitter. This species can be distinguished from other Australian swallows by its tail shape and pale rump.
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: American Cliff Swallow and Tree Martin.