|Part of the Tern colony (click on photos too enlarge)|
Herring and Lesser Black Backed Gulls cannot get near the colony, there are simply too many Terns to contend with, one immature Herring did drift into ‘ Tern airspace ‘ and was immediately set upon by no less than 11 Common Terns. The real danger to the colony is Great Black Backs, they can and will just bully there way in with aggression and size.
After passing over the colony at least 3 times I came to a figure of 29 pairs, I cannot see the south side of the Jetty so this is very likely an undercount. Talking to John Archer shortly after he estimates, and I agree with him, there are around 80 Common Terns on this section of Thames at Crossness/Barking.
|Oystercatcher on nest|
On the walk back decided to give the Butterflies and Dragons the once over and try a few different settings on the camera.
|Four Spot Chaser - seen at another site|
|Male Emporer Dragonfly|
|Black Tailed Skimmer|