Colorado as well as other states are pretty specific on what weapons are legal. Since none specifically say spoons are legal I’d assume that they are not.
Colorado for example.
LEGAL HUNTING METHODS
1. CENTER-FIRE RIFLES
a. Must be .24 caliber (6mm) or larger
b. Must have at least a 16-inch barrel and be at least 26 inches long
c. If semiautomatic, they cannot hold more than 6 rounds on the magazine and chamber combined
d. Must use expanding bullets that weigh at least 70 grains for deer, pronghorn and bear, .85 grains for elk and moose, and have an impact energy (at 100 yards) of 1,000 ft. pounds as rated by the manufacturer.
e. It is illegal to hunt game birds, small game mammals or fur bearers with a center fire rifle larger than .23 caliber during the regular rifle deer and elk rifle seasons west of I-25 unless hunters have an unfilled deer or elk license for the season they are hunting. A small game license is still required.
2. FULLY AUTOMATIC RIFLES prohibited
3. MUZZLE LOADING RIFLES & SMOOTH BORE MUSKETS
a. In-line muzzle loaders are legal
b. Must be single-barrel that fires a single round-ball or conical projectile the length of which does not exceed twice the diameter.
c. To hunt deer, pronghorn or bear, they must be .40 caliber or larger
d. To hunt elk or moose, they must be .50 caliber or larger
e. From .40 caliber to .50 caliber, bullets must weigh at least 170 grains
f. If greater than .50 caliber, bullets must weigh at least 210 grains
g. Shotshell primers are legal
h. Pelletized powder systems prohibited in muzzle loading seasons
i . Cannot be loaded from the breech in muzzle loading seasons
j . Only open or iron sights allowed in muzzle loading seasons. Scopes prohibited. Fiber optic sights and fluorescent paints are legal. Artificial light, batteries and electronic gear are illegal
k. Sabots are prohibited in muzzle loading seasons. Cloth patches are not sabots
4. HAND-HELD BOWS means a long bow, recurved bow or compound bow on which the string is not drawn mechanically under tension. String or mechanical releases that are hand drawn or hand held without other attachments or connections to the bow (other than bowstring) are legal.
a. Hand-held bows, including compound bows, must use arrows equipped with a broadhead with an outside diameter or width of at least 7/8 inch with at least 2 steel cutting edges. Each cutting edge must be in same plane for entire length of cutting surface.
b. Only legal hand-held bows can be used by archery license holders during archery season
c. Min. draw weight of 35 lbs. required. Let-off max. of 80%
d. No part of bow’s riser (handle) or track, trough, channel, arrow rest or other device (excluding cables and bowstring) that attaches to riser can contact support and/or guide the arrow from a point rearward of the bow’s brace height behind the undrawn string.
e. Bows can propel only a single arrow at a time. No mechanism for automatically loading arrows permitted.
f. Scopes, electronics or battery-powered devices cannot be incorporated into or attached to the bow.
g. Hydraulic or pneumatic technology cannot be used to derive or store energy to propel arrows. Explosive arrows are prohibited.
5. SHOTGUNS
a. Must be 20 gauge or larger and fire a single slug
b. Barrel length must be min. 18 inches with min. overall length of 26 inches.
6. CROSS BOWS
a. Draw weight must be min. 125 lbs.
b. Draw length must be min. 14 inches from front of bow to nocking point of drawstring
c. Positive mechanical safety device required
d. Bolt must be at least 16 inches long, have a broadhead at least 7/8-inch wide and at least 2 steel cutting edges. Each cutting edge must be in same plane for entire length of cutting surface
e. Cannot be used in archery season
7. HANDGUNS
a. Barrels must be at least 4 inches long
b. .24 caliber (6mm) or larger diameter expanding bullet required
c. Shoulder stocks or attachments prohibited
d. Must use cartridge or load that produces min. energy of 550 ft lbs. at 50 yds.
e. Allowed in the field only if not concealed.