Details here on the Fraser Valley birding group:
JUNE 17/18 UPDATE-- Still present! This report from Rick Toochin:
"The field is located on Flood Hope Road (the exit road off Highway 1) about 1.5 km past the turn off for Floods Road (the road that goes over the train tracks to the airport). When you are heading east on Flood Hope Road, you travel past a house and an old barn. There is an opening that allows you to look in the field. Watch for a buffy-brown bird that is small and round in shape that likes to fly up in the air and do a large undulating circle or two. As it flies it has very obvious white tail feathers and a black tail tip in the center of the tail. This bird is not a Vesper Sparrow which would be the only other potential bird that has this kind of tail pattern that I can think of that might be in that habitat. It does sit in fence posts so you can get a look at it but to date it has been too far for a photograph. Hopefully this will change.
***PARKING is not permitted along most stretches of the road so PARK AT YOUR OWN RISK or find somewhere else, then walk
Good luck and be sure to report back to us!