Nene and mongoose
This pair of nene (Hawaiian goose) were grazing when they noticed the mongoose (above). A mongoose isn’t a real threat to an adult nene, but it’s a real menace to a nene’s eggs and chicks. Though these birds weren’t nesting in this area and didn’t have chicks with them, Their protective instincts kicked in and one of the birds chased the mongoose away (right).
The mongoose scurried off into the tall grass, then reappeared on the edge and took stock of the scene (below). But when it ventured out (bottom), the nene’s attitude hadn’t mellowed and another charge ensued.
This scenario was repeated a few times before the mongoose lost interest and wandered off. Mongooses are very quick and will use this tactic of feints and retreats to wear out their intended victim. In this case, like the nene, it appeared to be more going through the motions in preparation for the next time it encounters a nene nest or chicks.