A description of each variable can be found in the BBIRD protocol

CompNID
NID
Nst_ID
Species
Plot
Site
State
Yr
Trtmt
Nsttype
Stn
Dirstn_d
Dststn_m
Lat_m
Lat_d
Lat_min
Lat_sec
Long_m
Long_d
Long_min
Long_sec
Elev_m
Nstsubs1
Nstsubs2
Nstcncl1
Nstcncl2
Nstht_m
Nsbsht_m
Dcedg_cm
Health
Orient_d
Nspbrnch
Dspbr_cm
Dstem_cm