GEAR UP LNDG BY A LOW TIME BE76 CFI AFTER SOME DISTR IN THE TFC PATTERN WHICH INCLUDED A POTENTIAL CONFLICT AND A NEAR BIRD STRIKE ON FINAL AT ZZZ; US.

Narrative

I WAS DOING TKOFS AND LNDGS AT ZZZ. WHILE IN THE DOWNWIND LEG (APPROX MIDFIELD) FOR RWY 18; THE PAX AND I OBSERVED AN ACFT APCHING FROM THE W (L SIDE) TRANSITIONING E WITH APPROX 1/8 MI CLOSURE AND CLOSE TO SAME ALT. DUE TO POSSIBLE CONFLICT WITH APCHING ACFT; MY ATTN WAS DIVERTED IN ATTEMPT TO AVOID THE ACFT'S FLT PATH. TRANSITIONING ACFT WAS NOT COMMUNICATING ON ZZZ CTAF. FOLLOWING THE CONFLICT; I CLRED THE AREA FOR A BASE TURN. ON TO FINAL TURN; A GROUP OF LARGE BIRDS FLEW ACROSS THE FINAL APCH PATH; AGAIN MY ATTN WAS DIVERTED. UPON APCH AND LNDG; THE LNDG GEAR WAS NOT EXTENDED WHICH RESULTED IN A GEAR RETRACTED LNDG. CONTRIBUTING FACTORS: DISTRS IN TFC PATTERN CAUSED MISSED CHKLIST ITEMS. NEAR MISS CAUGHT ME OFF GUARD. RELYING ON ANOTHER PLT FOR BACKUP. POOR COM. CORRECTIVE ACTIONS: SPECIAL EMPHASIS ON CHKLIST ITEMS. ENCOURAGING ALL PLTS TO COMMUNICATE INTENTIONS ON UNCTLED FREQS. ENFORCEMENT OF ADVISORY CIRCULARS CONCERNING OPS AT UNCTLED ARPTS. HUMAN PERFORMANCE: DISTRS IN THE TFC PATTERN CAUSED DELAY IN CHKLIST PROCS THAT WERE NEVER ACCOMPLISHED.