A Bird on the Thames

We are now in the period when Gulls, Terns and Waders appear on passage in this part of the Thames. For movement to occur certain conditions usually have to be present, these are,
1. North and/or East winds.
2. Rain/Showers.
3. Cloudy/murky
4. A rising tide.

This morning two of these conditions were present, a NE wind and a blanket of cloud, though visibility was good on the river. It did produce one very good species for this area, a juvenile Kittiwake, which flew upriver turned around at the Dome, stayed in mid-river for a minute (affording good views), and then went back downriver. This is only the third known record of this species at this site, and the first immature record. Unfortunately this star had a poor supporting cast, only 4 Adult Common Terns (I did expect far more with possibly some Arctic Terns)and a few Common Gulls the only notable birds.
The rest of the area was quiet, a Sparrowhawk flew over and Teal numbers have now reached 16 on the Dock. The only other migrant was a single Reed Warbler.