page_title: List of birds of Pennsylvania
section_title: Northern storm-petrels
hierarchical_section_title: List of birds of Pennsylvania / Northern storm-petrels
caption_attribution_description: English: Leach's Storm-petrel (Oceanodroma leucorhoa)
context_page_description: This list of birds of Pennsylvania includes species documented in the U.S. state of Pennsylvania and accepted by the Pennsylvania Ornithological Records Committee. As of June 2018, there were 432 species on the official list. Of them, 100 are classified as accidental, 32 are classed as casual, six have been introduced to North America, two are known to be extinct and another might be, and two have been extirpated. An additional nine species are classed as provisional and are also classed as accidental. Four more species are also included in this list whose reports PORC have not evaluated; they too are classed as accidental.
  This list is presented in the taxonomic sequence of the Check-list of North and Middle American Birds, 7th edition through the 61st Supplement, published by the American Ornithological Society. Common and scientific names are also those of the Check-list, except that the common names of families are from the Clements taxonomy because the AOS list does not include them.
  Unless otherwise noted, all species listed below are considered to occur regularly in Pennsylvania as permanent residents, summer or winter visitors, or migrants.
context_section_description: Order: Procellariiformes   Family: Hydrobatidae
  Though the members of this family are similar in many respects to the southern storm-petrels, including their general appearance and habits, there are enough genetic differences to warrant their placement in a separate family.
  Leach's storm-petrel, Hydrobates leucorhous (A)
  Band-rumped storm-petrel, Hydrobates castro (A)
caption: Leach's storm-petrel
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