TTV Coverage map key
yellow=early only;
white=late only;
black=both periods;
red=single visit to remote tetrad
Roving Records map key
blue=winter only;
red=breeding only;
black=both seasons
Species Richness map key
Percentage of species found so far.
white=1-50%;
yellow=50-74%;
orange=75-90%;
red=greater than 90%
(Based on previous atlas data)
In breeding season, only species
with possible evidence or
higher are counted
Tetrad Species Richness map key
Number of species* found so far.
(* breeding species only)
Clear=No species!;
white=1-9 spp;
yellow=10-19 spp;
orange=20-34 spp;
red=35-49 spp;
blue=50-79 spp;
black=greater than 80 spp
Species map key
white=no breeding evidence;
yellow=possible breeding;
orange=probable breeding;
red=confirmed breeding
Species map key
red=present
% spp. confirmed breeding
white=1-9%;
yellow=10-24%;
orange=25-49%;
red=50-74%;
black=75% or more.
% of species recorded with
confirmed breeding evidence
