Robert Frost`s "Never Again Would Birds` Song Be the Same," "The Oven Bird," and "The Need of Being Versed in Country Things" include in all of them a singing bird or birds as one of the poetic characters. In the traditional nature poetry, birds and their song have had the convention of symbolizing poets and their poetry respectively. It is, therefore, expected that the birds in these nature poems of Frost will also represent pastoral poems of a poet born belatedly in the age of technology. The close examination, however, discloses Frost`s intention to re-formulate the tradition of nature poetry to befit the human consciousness of modern world. The two distinctive strategies used by Frost for the renewal of the tradition of nature poetry are the admonition against the danger of "pathetic fallacy" and the synecdochic use of his nature poems. The speakers in "Never Again Would Birds` Song Be the Same" and "The Oven Bird" seem to come close to the pathetic fallacy but distance themselves from and warn us against it by reminding us that we are living in the age of the "diminished" world. And in "The Need of Being Versed in Country Things" the speaker in turn seems to deny explicitly the pathetic fallacy but shows his implicit nostalgia for the pastoral tradition. Frost comes to the dialectic conclusion that a poet can be allowed to use the fallacy to the extent that, if the occasion demands, such creatures as birds can be anthropomorphized to project the poet`s own thoughts, feelings, beliefs, or hopes. All of the three poems are themselves good examples of the use of poetic synecdoche, in which a small thing or event comes to have a larger meaning or meanings. "Never Again Would Birds` Song Be the Same" expands Frost`s personal love into the substance of human culture, that is, the cultivation of nature, which the love of Eve and Adam brought forth into the fallen world. It is suggested in this poem that poetry is the product of the dialectical cross of human culture and nature, which are respectively represented by Eve`s and birds` voices. "The Oven Bird" uses the bird`s talky song as the synecdoche representing the kind of poetry befitting the diminished world of industry, and further asserts the necessity of the poetic creation against the unfavorable environment. And "The Need of Being Versed in Country Things," through the description of the desolate scene of a burned house and the happy song of the phoebes who are using the place as their new dwelling, admonishes us against the danger of pathetic fallacy and further reminds us of the dialectical relations between nature and human culture. These three poems show us the tradition of nature poetry newly formulated by Robert Frost, a modern poet.