US #4462 – 2010 64¢ Monarch

On May 17, 2010, the USPS issued the first stamp in the Butterfly Series.

In late 2009, the USPS unveiled the first butterfly stamp for greeting card envelopes that required additional postage (an extra 20¢) than the standard one-ounce rate covered.  This would apply to envelopes that couldn’t be sorted on the USPS’s automated equipment, otherwise known as “nonmachinable.”

US #4603 – 2012 65¢ Baltimore Checkerspot Butterfly

Some of these nonmachinable envelopes include those that are oddly-shaped or vertical, lumpy, rigid, or with clasps, ribbons, or buttons on them.  Even if an envelope weighed less than one ounce, but was unmachinable, it would need this stamp.  However, letters that were simply heavy didn’t necessarily need it.  The two-ounce rate at the time was 61¢, and this stamp was 64¢, so they would be overpaying by 3¢ if they used it.

US #4736 – 2013 66¢ Spicebush Swallowtail Butterfly

The USPS worked closely with the greeting card industry on this new stamp.  Prior to this issue, some greeting card envelopes would be imprinted with “extra postage required.”  With the creation of this new stamp, the Greeting Card Association encouraged its members to print a butterfly silhouette on the envelopes of cards that would require this additional postage.  Reflecting this close working relationship, the 64¢ monarch butterfly stamp was issued on May 17, 2010, at the National Stationery Show held at the Jacob Javits Center in New York.

US #4859 – 2014 70¢ Great Spangled Fritillary

The monarch stamp remained in use for two years, being replaced by the Baltimore checkerspot butterfly stamp in 2012 when the nonmachinable rate increased to 65¢.  New stamps were issued each year through 2016.  The 2015 and 2016 issues followed the Forever format, in printing “non-machinable surcharge” on the stamp, rather than the actual denomination.

The California dogface butterfly stamp was initially announced in 2016 and expected for a 2017 release.  However, the USPS said that they had designed the stamp, but wouldn’t produce it until supplies of existing butterfly stamps were nearly depleted.  So that stamp wasn’t issued until 2019.

The California dogface stamp remained in use for two years.  It was replaced in March 2021 with the Colorado hairstreak butterfly stamp.  This was to meet the new nonmachinable rate of 75¢.

US #4999 – 2015 71¢ Eastern Tiger Swallowtail

US # 5136 – 2016 68¢ Eastern Tailed-Blue Butterfly

US #5346 – 2019 70¢ California Dogface Butterfly

2021 Colorado Hairstreak
US #5568 – 2021 75¢ Colorado Hairstreak


Get all the Butterfly stamps issued from 2010-2019 in one convenient, money-saving set here.

View lots more US and worldwide butterfly stamps.

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  1. I look forward to additions to this set as the years go by. Inflation will help this beautiful issue along. I’ve mainly used these on large envelopes, as it is those square greeting cards that require extra postage. i’ve always wondered why the cancelling machines can’t handle squares.

  2. I remember when the first “butterfly series” stamp was issued back in ought nine. So far there have been eight different butterfly nonmachinable stamps issued. I wonder how many more will come?

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