Fig. 3.

Simulated distributions of weekly offspring survival rates of barn swallows in Nangang based on 1,000 times of bootstrap resampling. The average offspring (i.e., eggs and chicks) survival rates were estimated between May 30th (before a thrush’s predation) and June 7th (after a thrush’s predation). (a) The first distribution was generated from nests that contained eggs and/or chicks of all ages on May 30th. (b) The second distribution was based on nests that contained eggs of > one week old and/or chicks < one week old on May 30th. The black line indicates the average offspring survival rate of five nests predated by a Taiwan whistling thrush.