Over the last few days variable numbers of little terns have come an d gone, behaviour consistent with prospecting for a breeding site. Max count is 24 birds so far. However close observations have shown that they are not finding fish. Typically at this point males will catch sand eels and overfly the group hoping to attract a female. Typically three or four may give chase with the sand eel finally being presented to one of the females. To date this has not bee n observed. Litte terns choose estuarine areas for breeding because if the sand eels and other fish fail they can switch to hunting invertebrates in the estuary. Little terns are known to be capable of switching their diet to 100% invertebrates when required. However if they do not find sand eels at the start of the season, courtship and pairing cannot proceed and they will look elsewhere, as has been the pattern in recent years.