Nest in holes in wood blocks or in abandoned nests of Sceliphron wasps. Cell partitions and caps are made of leaf pulp (Cane et al. 2007).
endemic to a single nation
Regularity: Regularly occurring
Type of Residency: Year-round
Global Range: (200,000 to >2,500,000 square km (about 80,000 to >1,000,000 square miles)) The more western subspecies, O. r. biedermanni occurs from Oregon and California to Utah and Arizona, with the typical subspecies farther east into central Texas (Sampson et al., 2009). This species is not reported from the Boulder, Colorado area by Kearns and Oliveras (2009a,b), but Scott et al. (2011) report O. r. ribifloris from that and six other counties. The species has been used for crop pollination in Mississippi and Alabama where it is not native.
Catalog Number: USNM 536988
Collection: Smithsonian Institution, National Museum of Natural History, Department of Entomology
Collector(s): W. Porter
Year Collected: 1899
Locality: Romeroville, N.M., New Mexico, United States
- Type: 1900. Ann. Mag. Nat. Hist. Ser.7 5: 410.
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Comments: both wild and cultivated species of Rubus are apparently among the preferred flowers, and this is an important pollinator. This is also a very effective pollinator of cultivated blueberries. Mitchell also reports visitation of thistles and Ceanothus.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 81 to >300
Life History and Behavior
Comments: Adults March to May in most of the range.
Molecular Biology and Genetics
Statistics of barcoding coverage: Osmia ribifloris
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
National NatureServe Conservation Status
Rounded National Status Rank: NNR - Unranked
NatureServe Conservation Status
Rounded Global Status Rank: G4 - Apparently Secure
Reasons: This is moderately widespread and apparently fairly common western bee. It has also been used for commercial pollination in the south-central USA where it is not native.
Intrinsic Vulnerability: Moderately vulnerable to not intrinsically vulnerable.
Environmental Specificity: Moderate to broad.
Comments: Adaptable to agricultural use, readily accepts artificial nest bocks.
Global Short Term Trend: Unknown
Global Long Term Trend: Unknown
Comments: Nothing suggesting any large-scale threats to this species was found. It is apparently rather common in many areas.
Global Protection: Unknown whether any occurrences are appropriately protected and managed
|This article does not cite any references or sources. (December 2009)|
Osmia ribifloris, one of several species referred to as a blueberry bee, is a megachilid bee native to the coastal mountains of southern California. This solitary bee normally gathers pollen from manzanita, but will pollinate blueberries, and is sometimes used commercially for this purpose.
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Names and Taxonomy
Comments: In subgenus Osmia. A subspecies, O. r. biedermanni is often recognized, e.g. Sampson et al. (2009).
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