Can "shrugging" only be done with shoulders?

Please compare

He shrugged.

and

He shrugged his shoulders.

Is there anything else that can be shrugged, besides shoulders? To me it sounds like duplication when used in this way. I'm aware of constructs like "He shrugged it off." but that's not what I'm interested in, and it also implies the use of shoulders, doesn't it?

So why the need to specify the shoulders as an object?

[edit: I also find "he shrugged his eyebrows" but that's rather rare.]

Browsing through COHA and Google Books, I can’t find any body parts that can be shrugged apart from shoulders. In any case, the intransitive use — she shrugged etc. — is certainly always understood as the shoulder-gesture — it is, as you say, essentially redundant.

So shrugged is very nearly a stormy petrel. The only other thing you can do with it (that I can think of or find in the dictionary) is to shrug something off.

(If anyone at a subscribed university or library is reading, by the way, the OED online would be my best bet to look for other usages — their historical quotations will hopefully show how it came to be used this way. Unfortunately I’m currently travelling and so without access. Also, a clever COHA search would probably be able to automatically look there for instances of anything non-shouldery being shrugged, more thoroughly than I could browse.)

According to Google Ngram, men are shrugging their broad, heavy, great shoulders less and less.

But before that, let's see what men and women shrug most often according to Google Books.

For men I entered the expression shrugged his *. The asterisk symbol which follows will display the first word that comes after the pronoun his. Note that it is superfluous and counterproductive to search for "he shrugged his" because the possessive pronoun already tells us the subject is male and moreover you would ignore the innumerable instances where a proper noun or noun phrase would be used, for example "Daniel shrugged his", "Her husband shrugged his" etc.

For women I repeated the same operation

Interestingly, people tend to shrug off females i.e. shrugged her off. I went back to my first Ngram and repeated the experiment with shrugged him * The following results were: shrugged him off, shrugged him away, shrugged him aside

For the feminine Ngram chart I wondered if a woman might shrug her pretty hips, finger, eyes or eyebrows. I entered the terms: shrugged her shoulders, shrugged her pretty *, shrugged her thin *, shrugged her plump *, shrugged her white *

The results proved conclusively that shoulders is the only part of the human body associated with the verb, shrug.

In the following "masculine" Google Ngram Viewer I added the terms: shrugged his heavy *, shrugged his great *, shrugged his thin *, he shrugged his broad *, he shrugged his shoulders, and shrugged his shoulder. Once again the asterisk substitutes the first word that follows

Men only shrug their great or massive shoulders, I was hoping for something a little more titillating. You may have noticed that I forgot to add he shrugged his massive * but if you don't believe men have massive shoulders, do the operation yourselves...

Oh, all right. I'll do it myself

Unsurprisingly, the adjective broad is most commonly associated with male shoulders, but what I do find peculiar is the drop in the number of times men shrug their shoulders (see the penultimate chart), apparently there was an impressive peak in the 1930s followed by a steady decline. I wonder why?

Is there anything else that can be shrugged, besides shoulders?

Yes! You can also shrug these things off

I Googled "shrugged off the" in Google Books and found...

shrugged off the news, leaflets, meaning of, notion, denial, sand, role, injury, idea, arm, past, loss, signals, irritation, annoying sth, blazer, Nazi's, thought, problems, crazy things, worry, traps, overcoat, indifference, eerie sensation, backpack, criticism, belt, ugly memory, prospect, nervousness, crash, police assault, comments, comparisons, feelings of guilt, yoke, gratitude, efforts, question, bad news, phenomenon, complaints, fraternal hand, encounter, feeling of impending doom, report, deal, treason accusation, feeling in disbelief, dream, coat, lifelong sacrifice, offending limb, snide remark, London damp, incident, possibility, knapsack, man's hands, fact, cool chill, shawl, gloomy mood, frontier town mentality, pain, daily calls, feeling of apprehension, suggestion, analysis, prudish atmosphere, stories, feeling of being watched, threat, blouse, burden, suit jacket, apathy, pack, horrendous accident, wealth and power, results, girl's embrace, punishment, consequences, hood of the anorak, cold, self-pity, first signs of, advice, doubters and the snipers, slight, pressure, hands that attempted to grab him, accoutrements of their past, stigma, snub, environmental costs, cares of the world, attacks, charge, tendency, first frost, abuse, compliment, request, hurt, negativity, blankets, effects of the weed, wasted emotion, guy's hand, darkness, failure; Chinese, the Mongols, and Siamese; mantle of religion, thefts, warnings, whole business, economic and social problems, letter, old man, reprimand, critique, shackles of traditional morality, lack of popularity, blows, conflict, cape, announcement, yellow jacket, duty, camisole of Marxism, tremor of excitement, sleaziness swirling about him, stick as he had shrugged off the carrot.; deepening suspicion, happy memory of that episode, etc...

I stopped at page forty, but as you can see there are many other things besides shoulders which can be shrugged off, and one of them being hands.