Dendrocygna javanica, a whistling duck that breeds in the Indian subcontinent and Southeast Asia.

A species of whistling duck, Dendrocygna guttata (family Anatidae), of the Philippines, Indonesia, New Guinea, and northern Australia.

Dendrocygna arcuata, a species of whistling duck.

(bingo) two

A species of duck, Dendrocygna eytoni, primarily of the Australian mainland, having large pale ornamental plumes on the flanks.

Alternative form of don't teach your grandmother how to suck eggs

Alternative form of if it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck

(simile, idiomatic) Very naturally; without effort.

Something potentially harmful or hurtful, such as criticism or insult, that nevertheless has no effect or impact on the target.

Alternative form of in two shakes