Canyon Wren
Catherpes mexicanus
The canyon wren measures 14–15 cm (5.5–5.9 in) with a long thin beak and square-tipped tail. Its speckled, chestnut coloration shades to gray at the head with a contrasting white throat patch. Its coloration and small size allow it to camouflage seamlessly with its rocky environment. The canyon wren's loud, distinctive call consists of a series of cascading notes. It sings most frequently in spring, however mated pairs may sing at any time. When defending its territory, the song is harsher and has a lower frequency,
ID text from Wikipedia, CC BY-SA 4.0
Grass Wren
Cistothorus platensis
The grass wren is 10 to 10.5 cm (3.9 to 4.1 in) long. Its upperparts are buffy brown with black and buffy whitish streaks on the back. The wings and tail have dusky bands. Its underparts are mostly buffy. Voice: The grass wren's song is a "series of short,...high notes such as high rattles, sharp trills, sparrowlike 'tr-tr-tr-tr' and nasal 'zèzèzèzè'."
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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