For anyone interested in simply seeing a bird of this type, there is currently one on the beach at Nickerson. Also present are at least 4 Roseate Terns, and many young Common Terns.
> On Jun 14, 2018, at 20:51, Joseph DiCostanzo <jdic...@nyc.rr.com> wrote: > > I just wanted to add some information to my comments about variation in > individuals. I looked at data from Common Terns trapped on Great Gull Island > in the summer of 2017. We have weights on 918 individuals. The weights ranged > from 99.1 grams to 158.9 grams. That means at the extremes, the largest birds > were 60% more massive than the smallest birds. That kind of difference is > likely to be noticeable in the field. And that difference is not between > different subspecies or populations, but within a single colony. > > I should point out that these 918 birds were nearly all trapped on nests, so > they are healthy birds. Also the birds at the top and bottom of that range > were not extreme outliers. At both extremes, there were numbers of > individuals within 10 grams of those lowest and highest weights. For the > statistically minded, the average weight was 126.0 grams and the standard > deviation was 9.45. > > Joe DiCostanzo > > Sent from my iPad > > -- > > NYSbirds-L List Info: > http://www.NortheastBirding.com/NYSbirdsWELCOME.htm > http://www.NortheastBirding.com/NYSbirdsRULES.htm > http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm > > ARCHIVES: > 1) http://firstname.lastname@example.org/maillist.html > 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L > 3) http://birding.aba.org/maillist/NY01 > > Please submit your observations to eBird: > http://ebird.org/content/ebird/ > > -- > -- NYSbirds-L List Info: http://www.NortheastBirding.com/NYSbirdsWELCOME.htm http://www.NortheastBirding.com/NYSbirdsRULES.htm http://www.NortheastBirding.com/NYSbirdsSubscribeConfigurationLeave.htm ARCHIVES: 1) http://email@example.com/maillist.html 2) http://www.surfbirds.com/birdingmail/Group/NYSBirds-L 3) http://birding.aba.org/maillist/NY01 Please submit your observations to eBird: http://ebird.org/content/ebird/ --