Black swift Cypseloides niger

                                   
                                                                                
                                                                                
Area|--------1966-1994 trends--------| |--1966-1979---||--1980-1994---|         
     Trend  P    N  (  95% CI  )  R.A.  Trend   P    N  Trend   P    N          
BC   -12.2  **   22 -23.2  -1.2   3.18    4.4        14  -2.1        20         
WE   -11.4  **   42 -21.2  -1.5   1.91   -0.1        22   1.4        33         
RE1   -4.4       19 -16.1   7.4   0.63    0.6         7  27.3    *   13         
US    -3.9       19 -16.3   8.5   0.63   -3.1         7  26.8    *   13         
CAN  -11.7  **   23 -23.1  -0.4   2.86    3.0        15  -2.1        20         
SUR  -10.9  **   42 -21.4  -0.4   1.91   -0.1        22   1.3        33         

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