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Forster's Tern
Sterna forsteri
Order
CHARADRIIFORMES
– Family
LARIDAE
Authors: Mcnicholl, Martin K., Peter E. Lowther, and John A. Hall

Table 1.

Summary of Forster’s Tern breeding success for several North American studies.


Location Nests Eggs laid Eggs hatched Young produced Reference
Manitoba 1968 85 217 33 15 McNicholl 1971
Manitoba 1969 20 40 2 0 McNicholl 1971
Minnesota 1992 132 ~396 0 — Fraser 1994a, G. Fraser pers. comm.
Minnesota 1993 189(1) ~567 105 20–45 Fraser 1994a, G. Fraser pers. comm.
Wisconsin 20 60 50 20 Harris et al. 1993
Iowa 92 230 ? 13+(2) Bergman et al. 1970
Washington 81 220 154 129(3) Hall 1989
California 35 98 64 33 M. C. Coulter unpubl.
Texas — 254 102 50(4) King et al. 1991
  • (1) About 140 nests lost due to weather. (2) “ . . . appeared to have survived at the nest-site” (p. 442); equivalent to survival to age of mobility, see below. (3) Survival to age of mobility when young leave nest area or colony site; on average when 4 d old. (4) Survival to 24 d old.