X1 Species seen in possible nesting habitat or singing male(s) present in breeding season.

S2 Singing male present on more than one date in the same place.

P2 Pair observed in suitable habitat in breeding season.

T2 Bird (or pair) apparently holding teritory.

D2 Courtship and display, agitated behavior. Includes copulation, well developed brood pat

N2 Visiting probable nest site.

B2 Nest building or excavation of a nest hole.

DD Distraction display or injury-feigning.

UN Used nest found.

FE Female with egg in the oviduct.

FL Recently fledged young.

ON Adults(s) entering or leaving nest site indicating occupied nest.

FS Adult carrying fecal sac.

FY Adult(s) with food for young or feeding young.

NE Nest and eggs, bird on nest or egg, or eggshells beneath nest.