We found the hyperkinetic’ foraging technique of SBS to be an excellent aid to their identification at long range—constantly running around, typically with head down (and with apparently reduced vigilance relative to other calidrids,although some bird species actually have a surprisingly good field of view behind their heads, so they can feed,head down, while maintaining vigilance; in the case of SBS, they may feed alone or widely spaced to guarantee a good view of attacking predators: D. Buckingham in litt.2010).