The shapes in “Macondo,” which open the first section of Cassandra Cleghorn’s first collection Four Weathercocks, are obscure and drenched in oil. As they wash onto shore “flayed and stifled,” they are pushed and pulled by the tide, but never named. We are given wings, feathers, pouches, and “a black eye bright in a face of black sheen,” but never the species. Even their heartbeat goes undefined, appearing as a “small throb” pinned to the speaker’s lap. Meanwhile, “lost farmers” spread straw along the shoreline, trying to soak up the oil.