- Author: Kathy Keatley Garvey
Mussen (1944-2022) was an institution. He was a global authority of honey bees. He was family to everyone. He joined our UC Davis Department of Entomology and Nematology in 1976, and although he retired in 2014, he continued his work.
So, every year since 2010 I've posted the "Thirteen Bugs of Christmas," and it seems right that I do so again.
Here's the story: Back in 2010, Extension apiculturist Eric Mussen (now emeritus) and yours truly of the UC Davis Department of Entomology and Nematology decided that "The 12 Days of Christmas" ought to be replaced with insects.
Why not? "Entomology" means "insect science," and it's the holiday season so why not change "five gold rings" to "five golden bees?" And add some other insects and pests, as well.
Note that the original "Twelve Days of Christmas," published in 1780, features no insects. Zero. Zilch. Nada. Just a partridge in a pear tree, 2 turtle doves, 3 French hens, 4 calling birds, 5 gold rings, 6 geese-a-laying, 7 swans-a-swimming, 8 maids a'milking, 9 ladies dancing, 10 lords-a-leaping, and 11 pipers piping.
Didn't seem fair.
So "five gold rings" became "five golden bees." Mussen sang the innovative song at the department's holiday party. The lyrics went viral when U.S. News picked it up:
On the first day of Christmas, my true love gave to me, a psyllid in a pear tree.
On the second day of Christmas, my true love gave to me, 2 tortoises beetles and a psyllid in a pear tree
On the third day of Christmas, my true love gave to me, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the fourth day of Christmas, my true love gave to me, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the fifth day of Christmas, my true love gave to me 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the sixth day of Christmas, my true love gave to me 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the seventh day of Christmas, my true love gave to me 7 boatmen swimming, 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the eighth day of Christmas, my true love gave to me 8 ants a'milking aphids, 7 boatmen swimming, 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the ninth day of Christmas, my true love gave to me 9 mayflies dancing, 8 ants a'milking aphids, 7 boatmen swimming, 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the tenth day of Christmas, my true love gave to me 10 locusts leaping, 9 mayflies dancing, 8 ants a'milking aphids, 7 boatmen swimming, 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the 11th day of Christmas, my true love gave to me 11 queen bees piping, 10 locusts leaping, 9 mayflies dancing, 8 ants a'milking aphids, 7 boatmen swimming, 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
On the 12th day of Christmas, my true love gave to me 12 deathwatch beetles drumming, 11 queen bees piping, 10 locusts leaping, 9 mayflies dancing, 8 ants a'milking aphids, 7 boatmen swimming, 6 lice a'laying, 5 golden bees, 4 calling cicadas, 3 French flies, 2 tortoise beetles and a psyllid in a pear tree
"On the 13th day of Christmas, Californians woke to see:?? 13 Kaphra beetles, ?12 Diaprepes weevils, ?11 citrus psyllids, ?10 Tropilaelaps clareae, ?9 melon fruit flies, 8 Aedes aegypti, 7 ash tree borers, 6 six spotted-wing Drosophila, 5 ?five gypsy moths, 4 Japanese beetles, 3 imported fire ants, 2 brown apple moths, and a medfly in a pear tree."
Today the song is still making the rounds, but with some different pests--pests that challenge the entomologists in the California Department of Food and Agriculture:
On the first day of Christmas, my true love gave to me, a psyllid in a pear tree.
One the second day of Christmas, my true love gave to me, two peach fruit flies
On the third day of Christmas, my true love gave to me, three false codling moths
On the fourth day of Christmas, my true love gave to me, four peach fruit flies
On the fifth day of Christmas, my true love gave to me, five gypsy moths
On the sixth day of Christmas, my true love gave to me, six white striped fruit flies
On the seventh day of Christmas, my true love gave to me, seven imported fire ants
On the eighth day of Christmas, my true love gave to me, eight longhorn beetles
On the ninth day of Christmas, my true love gave to me, nine melon fruit flies
On the 10th day of Christmas, my true love gave to me, ten brown apple moths
On the 11th day of Christmas, my true love gave to me, eleven citrus psyllids
On the 12th day of Christmas, my true love gave to me, twelve guava fruit flies.
On the 13th day of Christmas, my true love gave to me, thirteen Japanese beetles
And, then, of course, there's that dratted pest, the Varroa destructor (varroa mite) from Asia, which arrived in the United States in 1987. Known as the No. 1 enemy of beekeepers, this external parasitic mite not only sucks a bee's lifeblood, but can transmit debilitating viruses. This is not what you want for Christmas--or any other time.
Rest in peace, Eric. We miss you.


- Author: Kathy Keatley Garvey
You've heard "The 12 Days of Christmas," beginning with a single "partridge in a pear tree" and ending with "12 drummers drumming." In between: two turtle doves, three french hens, four calling birds, five gold rings, six geese-a-laying, seven swans-a-swimming, eight maids-a-milking, nine ladies dancing, 10 lords-a-leaping, and 11 pipers piping.
But have you heard "The 13 Bugs of Christmas?"
Back in 2010, Extension apiculturist Eric Mussen of the UC Davis Department of Entomology (now the UC Davis Department of Entomology and Nematology) and yours truly came up with a song about "The 13 Bugs of Christmas." Presented at the Department of Entomology's holiday party, it drew roaring applause. Then U.S. News featured it when reporter Paul Bedard picked it up.
It's still making the rounds, via social media, and it's also appeared in number of pubications, including a pest control magazine.
"The 13 Bugs of Christmas" is about a psyllid in a pear tree, six lice a'laying, 10 locusts leaping and 11 queen bees piping. Beekeepers know that distinctive sound of a queen bee piping.
"We attempted to keep the wording as close as possible for ‘The 12 Bugs of Christmas' and then we opted to spotlight some new agricultural pests in the next stanza," said Mussen, who retired in June 2014 after 38 years of service.
The song:
On the first day of Christmas, my true love gave to me, a psyllid in a pear tree.
On the second day of Christmas, my true love gave to me, two tortoises beetles and a psyllid in a pear tree
On the third day of Christmas, my true love gave to me, three French flies, two tortoise beetles and a psyllid in a pear tree
On the fourth day of Christmas, my true love gave to me, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the fifth day of Christmas, my true love gave to me five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the sixth day of Christmas, my true love gave to me six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the seventh day of Christmas, my true love gave to me seven boatmen swimming, six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the eighth day of Christmas, my true love gave to me eight ants a'milking, seven boatmen swimming, six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the ninth day of Christmas, my true love gave to me nine mayflies dancing, eight ants a'milking, seven boatmen swimming, six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the tenth day of Christmas, my true love gave to me 10 locusts leaping, nine mayflies dancing, eight ants a'milking, seven boatmen swimming, six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the 11th day of Christmas, my true love gave to me 11 queen bees piping, 10 locusts leaping, nine mayflies dancing, eight ants a'milking, seven boatmen swimming, six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
On the 12th day of Christmas, my true love gave to me 12 deathwatch beetles drumming, 11 queen bees piping, 10 locusts leaping, nine mayflies dancing, eight ants a'milking, seven boatmen swimming, six lice a'laying, five golden bees, four calling cicadas, three French flies, two tortoise beetles and a psyllid in a pear tree
Knowing the agony that Californians experience with the seemingly unending flood of pests, Mussen felt it "bugworthy" to add this verse:
"On the 13th day of Christmas, Californians woke to see:
13 Kaphra beetles,
12 Diaprepes weevils,
11 citrus psyllids,
10 Tropilaelaps clareae,
nine melon fruitflies,
eight Aedes aegypti,
seven ash tree borers,
six spotted-wing Drosophila,
five gypsy moths,
four Japanese beetles,
three imported fire ants,
two brown apple moths,
and a medfly in a pear tree."
Mussen noted that Tropilaelaps clareae is a honey bee mite from Asia, as is the well-known varroa mite (Varroa destructor), which was first detected in the United States (Wisconsin) in 1987 and is now beekeepers' No. 1 problem.
It's unlikely, however, that Tropilaelaps clareae and Varroa destructor will become part of any other Christmas song...but you never know...

