The Planters' Guild · A Pillar of the Guild

The Pollinator Library

The creatures that close the loop. A field guide to twelve Bay Area pollinators paired with the flowers their bodies fit, biweekly from Late 2026.

Five Bay Area pollinators — hover fly, honey bee, bumble bee, anise swallowtail, and Anna's hummingbird — illustrated in vintage natural history register on cream paper

Most pollinator writing starts with the bee. Honey, bumble, sometimes the cultural anchor that everyone already knows. We start with the relationship.

A long-tubed flower exists because something with a long tongue lives nearby. A flat composite head exists because short-tongued flies and small bees needed a landing pad. Read the pollinators and you read the garden.

The Pollinator Library covers twelve Bay Area pollinators biweekly across Late 2026 and into Spring 2027. Each entry takes one creature, pairs it to the flowers its body fits, and teaches you to recognize both the pollinator in flight and the floral architecture that needs it. The shelf below is arranged in reading order, № 01 to № 12 — from short-tongued generalists through specialist long-tongues to the only vertebrate on the shelf, Anna's hummingbird.

The shelf: twelve plates, ordered by tongue length and foraging fit — generalists first, specialist long-tongues and the vertebrate last. Opens Late 2026 · dates lock when production opens
01
Hover fly (Syrphidae) natural history plate

The Hover Fly

Syrphidae spp.

FlyGeneralist · short tongue

Bee mimic, not a bee. The most underappreciated pollinator in the garden. Works open umbels and composite heads that bees often overlook.

02
Sweat bee (Halictidae) natural history plate

The Sweat Bee

Halictidae spp.

BeeGeneralist · short tongue

Tiny, often metallic green. Ground-nesting solitary bee. If you've seen a small flying jewel on a daisy, this was probably it.

03
Honey bee (Apis mellifera) natural history plate

The Honey Bee

Apis mellifera

BeeGeneralist · medium tongue

The cultural anchor. Non-native, but the baseline most readers already know. We start here, then move outward.

04
Mason bee (Osmia lignaria) natural history plate

The Mason Bee

Osmia lignaria

BeeSpring specialist

The orchard's first pollinator. Solitary, early-spring, faster on fruit blossoms than honey bees in cold weather.

05
Leafcutter bee (Megachile) natural history plate

The Leafcutter Bee

Megachile spp.

BeeNative generalist

The bee responsible for the perfectly circular notches in your rose leaves. Distinctive nest behavior, important native generalist.

06
Bumble bee (Bombus vosnesenskii) natural history plate

The Bumble Bee

Bombus vosnesenskii & spp.

BeeBuzz pollinator

The primary Bay Area buzz-pollinator. Sonicates flower anthers to shake pollen loose. The reason your tomatoes, blueberries, and eggplants set fruit.

07
Carpenter bee (Xylocopa) natural history plate

The Carpenter Bee

Xylocopa spp.

BeeLarge-bodied · sometimes thief

The biggest native bee. Will chew through corolla bases to nectar-thieve when flowers are deeper than her reach. An ecological side door.

08
Painted lady butterfly (Vanessa cardui) natural history plate

The Painted Lady

Vanessa cardui

ButterflyLong proboscis · migratory

The Bay Area's mass-migration butterfly. Generalist nectar feeder, larval host on thistles and mallows. A common doorway into butterfly identification.

09
Anise swallowtail butterfly (Papilio zelicaon) natural history plate

The Anise Swallowtail

Papilio zelicaon

ButterflyNative · larval host specialist

California native. Caterpillar host on fennel, parsley, citrus. The argument for host plant versus nectar plant lives here.

10
Monarch butterfly (Danaus plexippus) natural history plate

The Monarch

Danaus plexippus

ButterflyObligate specialist · pollinia

Milkweed obligate. Carries pollen in unique sticky packets called pollinia, the same mechanism orchids use. A cultural and ecological anchor.

11
White-lined sphinx moth (Hyles lineata) natural history plate

The White-Lined Sphinx Moth

Hyles lineata

MothDusk pollinator · long proboscis

Hovers like a hummingbird at dusk. Tongue reaches deeper than almost any other Bay Area pollinator. The reason night-blooming flowers exist.

12
Anna's hummingbird (Calypte anna) natural history plate

Anna's Hummingbird

Calypte anna

BirdVertebrate · red-tubular coevolution

The only vertebrate in the Library. Year-round Bay Area resident. Red tubular flowers like California fuchsia, currants, and monkeyflower exist because she does.

How to use this hub

Bookmark the page or follow The Window Box newsletter to know when entries begin. Scanning to identify a pollinator you spotted? Work the visual: small short-tongued flies and bees on flat composite flowers up top; long-tongued butterflies and the hummingbird on tubular flowers near the bottom of the shelf. The morphological ordering predicts what flowers each creature prefers — the editorial argument the pillar will spend twelve entries making.