BACKYARD SECRET – HOW MUCH DOES A BROWN-HEADED NUTHATCH WEIGH? Nov1 A brown-headed nuthatch weighs 0.3 ounces (about the weight of 4 pennies) to o.4 ounces (roughly the weight of an AAA Alkaline battery). Share this: Email a link to a friend (Opens in new window) Email Share on Facebook (Opens in new window) Facebook More Share on X (Opens in new window) X Like this:Like Loading…