VC = Very Common
C = Common
U = Uncommon
R = Rare
VR = Very Rare
Ex = Extinct

I = Introduced
rI = Reintroduced
Es = Escapee
O = Ornamental
F = Free-ranging
RB = Resident Breeder
R = Resident
WV = Winter Visitor
PM = Passage Migrant
MB = Migrant Breeder
V = Vagrant
NBV = Non-breeding Visitor

BB = Bukit Batok
BC = Bukit Brown Cemetery
BG = Botanic Gardens
BT = Bukit Timah
CF = Central Forests
CC = Changi Cove
FC = Fort Canning
JL = Jurong Lake
KB = Khatib Bongsu
KD = Kranji Dam/Reservoir
KM = Kranji Marsh
KR = Kent Ridge Park
LH = Lorong Halus
MF = Mt Faber
MM = Mandai Mudflat
MS = Marina South
NT = Neo Tiew Lane
PG = Punggol Grassland
PH = Pulau Hantu
PR = Pasir Ris
PS = Pulau Semakau
PT = Pulau Tekong
PU = Pulau Ubin
PY = Poyan
SB = Sungei Buloh
SG = Simpang Grassland
SJ = St John's Island
SL = Seletar
SP = Sungei Punggol
SR = Sarimbun
SS = Sungei Serangoon
ST = Sentosa
TB = Telok Blangah Hill
TG = Tuas Grassland
TP = Tampines
WC = West Coast