Hi: Best way is to look at head shape, from what I understand they have a gland in their head to help deal with salt water, so the head looks more like a block than other geese. The white collar on neck can be seen on all cacklers and is not a good mark to rely on. On an Aleutian form the collar should go all the way around the neck. So if head shape is not addressed then it would be hard to id an Aleutian in the valley. Here is a good guide I post just about every year in the late fall :) : http://www.dfw.state.or.us/resources/hunting/waterfowl/goose-permits/Goosefieldguide_2ndEdition_final.pdf Bob Archer PDX On Tue, Oct 14, 2014 at 7:51 AM, Marlowe Kissinger <rosebudgurl@xxxxxxx> wrote: > I saw the picture of the Cackling goose (Aleutian form). How do you tell > the difference. The only thing I see is size. > Are there any markings that tell it's an Aleutian vs a regular cackling? > Just trying to learn. > > Marlowe >