Cackling x Barnacle Goose?

About a month ago a Barnacle Goose along with a possible Cackling x Barnacle Goose was seen for a few days in the RNWR area. The Goose in the images above strongly resembles the Cackling x Barnacle Goose seen at that time. I saw it this morning amongst a large flock of Cacklers between markers 2 and 3 on the north side of the road along the auto tour.

Cackling Goose - Odd Colored Neck

I did a quick trip around the auto tour at RNWR today. Things were a little slow and it was a pretty dreary day.
I did run across this Cackling Goose with an unusually colored neck. I've seen both Canada and Cackling Geese with a white ring around the base of the black feathers on the neck. Sibley mentions that all subspecies of Canada Geese can have white neck collars. I suspect that is what this is, just gotten out of control.

Cackling Goose - Hissing

Some Cackling Geese were standing on the berm around marker 12 of the auto tour at RNWR during my last visit. It was a great opportunity to get some close shots of these geese. As I was shooting the goose above it suddenly got annoyed by another and hissed at it just as I took a shot. They have pretty good sized tongues. Most bird tongues I've photographed are usually thin.

Hybrid Goose

For those that frequent Fernhill Wetlands, you expect to be greeted by the hybrid Mallards that hang out near the parking lot. These birds are the result of cross breeding between some resident white domesticated ducks and wild Mallards. They produce quite a variety of blotchy, multicolored offspring.
Yesterday I came across another hybrid water fowl; a hybrid Canada or Cackling Goose. When I took this picture, I thought the white goose was a Snow Goose as I had seen a couple with a large flock of Cacklers a couple of weeks ago. But when I viewed the images tonight, I realized that it must be a domestic goose as its wings are missing the black primaries of the Snow Goose.
Then I noticed something else. If you look at the goose in front of the white domestic goose, you will notice that the white cheek patch is large and smudged looking. Even closer examining reveals that its legs have an orange tint. After some internet research it is apparent that this is a hybrid.
I'm still not very good at differentiating between Canada and Cackling Geese while in flight, but I think the goose in the lead is a Canada Goose and the trailing Goose is a Cackling Goose. I base this on the smaller size and shorter neck length of the trailer. I'm guessing that the Cackler and the domestic goose are the parents of the hybrid.

Cackling Geese

As I said in an earlier post, there had to be at least a thousand Cackling Geese on the main pond at Fernhill Wetlands when I arrived there last Sunday. They weren't easily spooked either. Several people walked by, some even with dogs, and the geese didn't flinch. The top picture shows just a small portion of all of them.

I've been hoping to get a positive ID on this subspecies of Canada Goose for some time. I read that they are quite common here, but for some reason I always seem to see the standard larger version. These are obviously Cackling Geese as their necks are shorter and the head and bill proportionally smaller.
They stayed in this area for quite a long time and then, after I had long left to seek other opportunities, they started to take off. I just happened to be in their flight pattern so I got to observe wave after wave of them fly overhead.