Megachile perihirta, commonly known as the Western leafcutting bee, is a bee in the genus Megachile. The bee is native to western North America, ranging from Nebraska to Texas and Mexico, west to California, and north to British Columbia and Alberta, and often inhabits meadows and orchards. The bee is black with long whitish-yellow hair, more so below the thorax and abdomen. The abdomen, however, is mostly bare, although each segment has scattered whitish hair. The wings of the Western leafcutting bee are clear, while their veins are black. The pollen basket below the abdomen is bright red. Like most bees, adult western leafcutting bees drink nectar, whilst Western leafcutting bee larva feed both on nectar and pollen. Western Leafcutting Bee nests are created when a small group of bees work together to dig small burrows in sand, gravel, soil, or in rotting plants or wood. Inside this burrow it is found that the bees construct a series of cells lined with leaf fragments. Each cell contains pollen and nectar, then one egg is laid inside a cell. Adult Western leafcutting bees are seen normally from July to August, and live around one year.
No narrative description available for this taxon yet.
A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Megachile perihirta has left across the world's sequence archives.
At a glance
DNA specimens135
BINs1
Marker genes1
eDNA detections182
Countries2
The DNA barcodethe species' typical barcode, built from every sequenced specimen
COI-5P658 bp consensus113 specimens
ACGT
▸ drag or hover over the strip to read any position — letter and how much it varies
Violet ticks below the strip = positions where individuals differ; flat = the species' unchanging signature. 95% of positions are identical in every specimen.
Where individuals differ — all 30 variable positions, in barcode order
Each circle is a barcode variant; bigger = more specimens, colour = region. Lines join the most similar variants and the tick marks count the mutations between them — a tight cluster is one “dialect”, a long line a more divergent lineage. Click a circle to list its actual specimens.
Diversity (π)1.1%
Haplotypes16
BIN1
Most divergent pair0.76%
N.America
Closest relatives by DNA barcode
The species whose COI barcode is most similar to this one — a quick “who is this most like”. The percentage is how much the barcode differs; it approximates, but is not, the full evolutionary tree.
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★COI-5P
animal barcode
08Occurrence & distribution
Record type5 143 records
Wild obs. + sensor1 402
Museum / vouchered3 741
Range
Area of Occupancy AOO6 976 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy86% within 1 km
≤100 m 688≤1 km 319≤10 km 41>10 km 117
1 165 georeferenced · 237 without coordinates
Open the mapobservation + sensor1 402
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy79% within 1 km
≤100 m 186≤1 km 337≤10 km 96>10 km 44
663 georeferenced · 3 078 without coordinates
Open the institutions mapphysical evidence3 741
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions25 of 47 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Beltsville, US
1 071
Oregon State Arthropod Collectionlocation not on record
444
Weber State University, Bird and Mammal Collectionlocation not on record
261
Wuzhou, CN
255
Provo, US
253
244
Universidad Católica de Manizaleslocation not on record
195
Roberts Creek, CA
155
Santa Cruz, US
103
Royal Saskatchewan Museumlocation not on record
82
WSUClocation not on record
74
Vancouver, CA
53
WIlocation not on record
51
Colorado State Universitylocation not on record
45
University of Guelph, Centre for Biodiversity Genomicslocation not on record
43
Edmonton, CA
43
Natural History Museum of Utahlocation not on record
42
Cambridge, US
38
Anchorage, US
30
Florida State Collection of Arthropods, The Museum of Entomologylocation not on record
22
University of Central Floridalocation not on record
21
Alberta Environment and Parkslocation not on record
16
US
16
OSUClocation not on record
14
University of Alberta Museums (UAM)location not on record
14
Chicago, US
12
Champaign, US
10
BBSLlocation not on record
9
Toronto, CA
8
University of Alabamalocation not on record
6
Severin-McDaniel Insect Collectionlocation not on record
6
Toronto, CA
4
Cornell University Insect Collectionlocation not on record
3
UTSClocation not on record
3
Vernal, US
2
University of Manitoba, Wallis Roughley Museum of Entomologylocation not on record
2
US
1
Lexington, US
1
Washington, US
1
EL PASO, US
1
Sherwood Park, CA
1
Nelson, CA
1
Blacksburg, US
1
San Francisco State Universitylocation not on record
1
San Diego, US
1
Albuquerque, US
1
UNHClocation not on record
1
47 institutions · 3 661 of 3 741 vouchered records shown · 80 without an institution code
09Environmental DNA182 detections
Where the DNA of Megachile perihirta was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found182
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median17.9 °C 13.2–21.0
Seasonal swing summer↔winter24.9 °C
Max temp (day)24.5 °C 20.1–28.1
Min temp (night)13.2 °C 7.00–14.5
Precipitation28.7 mm/mo 13.3–58.2
Air humidity51.0 % 45.0–56.7
Moisture balance-110 mm/mo -152–-45.6
Vapour deficit1,119 Pa 708–1,231
Wind speed2.50 m/s 2.00–4.30
Cloud cover35.2 % 17.7–68.3
CHELSA 1981–2010, ~9 km grid, at location & month of 163 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.