Nishmat Kol Chai

נשמת כל חי תברך את שמך
The prayer uses the language of “all living things” not to limit the praise to that which comes from humans, but to also include praises that comes from any creation that has the breath of life. And, that is similar to the language used in the verse (Bereshis 7, 22) that included in the drowning of the Flood were כל אשר נשמת רוח חיים, which indicates all living creatures.

This prayer is probably referring to the different creatures that praise G-d as recorded in Perek Shirah. We do not know who authored Perek Shirah, but the concept that animals and birds praise HaShem is mentioned many times in the Gemara (see Sanhendrin 95b, Avodah Zarah 24b and Chullin 64b).