[Tweeters] Unusual behavior mallards vs geese

[judyem at olypen.com]

My sister in AR reported watching a surprising encounter between 
mallards (wild) and Canada geese. Her contingent of 8 mallards seem to 
get along okay on their pond, but when 4 Canada geese flew in and 
alighted, the ducks took exception. She reports the ducks encircled the 
geese, then kept tightening the circle until the geese got the 
unfriendly message and took off. Given the size difference I found their 
response and giving ground ( well, water) surprising. Has anyone seen 
similar interactions?

Judy Mullally Port Angeles WA judyem at olypen dot com