I reconsidered the sex determination technique of using white spots of the inner vanes on primaries in the Spotted Nutcracker Nucifraga caryocatactes japonica. Thirty-two stuffed specimens collected at Yamashina Institute for Ornithology were examined. My results indicate that the existence of the white spot is unsuitable for use in sex determination. There were no significant differences between juvenile males and females in length of the longer axis of the white spot on primaries, or in length of the axis of the white spot on the 4th primary.
We developed a nest box trap for the Broad-billed Roller Eurystomus orientalis. This capture trap is a technique for monitoring the breeding ecology of this species. Important features of this trap are (1) ease of setting and (2) safety for captured birds. We captured rollers using this trap on 27 occasions at 24 nest boxes in mid-May, 2010. This capture period was during the pre-egg-laying stage. We captured 12 individuals. Ten individuals bred in the nest boxes in which they were captured, one individual bred in a different location, and one individual was missing. In some cases, nest box trap malfunction and avoidance of the trap (i.e., removing a pin from the trap) were observed. On the basis of our results, it appears that the trap is useful for capturing E. orientalis; however, we suggest that some points can be improved, such as changing materials (i.e., pin types and wires). Because capturing during the pre-incubation period and other periods could disturb breeding, we concluded that it is best to capture the rollers during the egg-incubation period.
In this paper, we explain the importance of academic publishing of subspecies identification for Japanese bird checklists. In addition, we discuss the relationship between Japanese and scientific names. Sometimes, when classification is changed, subspecies identification can be key (i.e., a subspecies may be designated as a species). The subspecies identification is difficult in common observation, but Bird banding is a good opportunity for the identification. We hope Japanese bird-banding researchers attempt this identification.