Gull-billed tern Sterna nilotica



Region |-----------1959 - 1988 trends----------|
        Trend  N   (  95% CI  ) Sign.  Rel. Abu.
 FLA    -0.5    21   -1.4   0.5             0.11
 TEX    -1.6    29   -3.5   0.3             1.09
 SUR    -1.5    71   -3.2   0.1    *        0.42