I don't understand the doom and gloom about the prospects for a good population buildup this summer.
The pace of the spring migration this season seems about the same as compared to 1997 http://i959.photobucket.com/albums/ae78 ... looper.jpg
The fall migration in 1997 was large so why couldn't it be large this coming summer?
Also, in the past (e.g. 1993) there have been some large fall migrations even though the summer weather was much colder than normal.
Anyway, I will be visiting central and northern Minnesota the first week in August and I fully expect to be able to photograph migrating, clustering and gregariously nectaring monarchs in abundance up near the Canadian border around Aug. 5-7.