The Pacific Tree Frog or Pacific Chorus Frog (Pseudacris regalia)is a keystone species on the much of the West Coast of North America. It is also the state amphibian of the State of Washington. It is tiny but loud, and lives in large raucous communities. One local community here in Seattle is located in the Frog Ponds of Magnusson Park. Go there any spring or summer day near dusk or pre-dawn and you'll hear them singing their little hearts out.
https://en.wikipedia.org/wiki/Pacific_tree_frog
Recording miscellany:
Sound Devices 702
ORTF: Røde nt5 pair