| A.V. | Accidental Visitant. A bird found beyond the limits of its usual range. |
| L. | Length of a bird from the tip of its bill to the end of its tail. Remember that living birds look shorter than the measurements of specimens given beyond. |
| P.R. | Permanent Resident. A species which is found in the same locality throughout the year. The Bob-white, Ruffed Grouse, most Owls, and Hawks, the Crow, Jays, Black-capped Chickadee and the White-breasted Nuthatch are Permanent Residents. |
| S.R. | Summer Resident. A species which comes from the South in the spring and, after nesting, returns to its winter quarters. |
| T.V. | Transient Visitant. A species which visits us in the spring while en route to its more northern nesting grounds, and in the fall when returning to its winter home in the South. Most Transient Visitants are found both in the spring and fall, but some, like the Connecticut Warbler, are found in the North Atlantic States only in the fall. |
| W.V. | Winter Visitant. A species which comes from the North to remain with us all, or part of the winter and then return to the North. Winter Visitants may arrive in September and remain until April, or they may come later and only for a brief stay. |
Note. Measurements are in inches.