| W | Winter occurrence in park. |
| S | Summer occurrence in park. |
| P | Permanently occurring in park. |
| T | Fall and/or spring transient. |
| C | Common: Found on all visits to the proper
habitat, during the proper season(s); often in large numbers. |
| FC | Fairly common: seen on a majority of visits to the proper habitat,
during the proper season(s). |
| UC | Uncommon: present each year in proper habitat and season(s), but
in small numbers. |
| R | Rare: irregular occurrence in small numbers, not predictable, and
overlooked on many visits to the proper habitat, in the proper season(s). |
| • | Known to have nested in the park. |
| I | Irregular: status varies year to year. |