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Birds A-Z 1 2 3 4 5 1 ... 1 2 3 4 5 ... 5 Acorn Woodpecker Melanerpes formicivorus Allen's Hummingbird Selasphorus sasin American Crow Corvus brachyrhynchos American Kestrel Falco sparverius American Pipit Anthus rubescens American Robin Turdus migratorius Anna's Hummingbird Calypte anna Ash-throated Flycatcher Myiarchus cinerascens Band-tailed Pigeon Patagioenas fasciata Barn Owl Tyto alba Barn Swallow Hirundo rustica Bell's Sparrow Artemisiospiza belli Bewick's Wren Thryomanes bewickii Black Phoebe Sayornis nigricans Black-headed Grosbeak Pheucticus melanocephalus Black-throated Gray Warbler Setophaga nigrescens Blue-Gray Gnatcatcher Polioptila caerulea Brewer's Blackbird Euphagus cyanocephalus Brown Creeper Certhia americana Brown-headed Cowbird Molothrus ater Bullok's Oriole Icterus bullockii Burrowing Owl Athene cunicularia Bushtit Psaltriparus minimus California Quail Callipepla californica California Scrub Jay Aphelocoma californica 1 2 3 4 5 1 ... 1 2 3 4 5 ... 5

Sweat Bees Lasioglossum Lasioglossum Early Spring – Fall Read More Red-tailed Micro-Shortface Bee Micralictoides ruficaudus April and May Read More Tripartite Sweat Bee Halictus tripartitus March - November Read More

Bees A-Z Filter by Bee Type Select Bee Type Andrena Miner Bee Andrena January - Fall (but primarily January - April) Read More Ashmeadiella Ashmeadiella Summer Read More Bindweed Turret Bee Diadasia bituberculata April to June Read More Black-tailed Bumble Bee Bombus melanopygus January - July (rarely as early as December) Read More California Bumble Bee Bombus californicus February - September Read More California Digger Bee Anthophora californicus February - May; there may be a Fall generation too Read More California Digger-cuckoo Bee Brachymelecta californica June - August Read More California Fairy Bee Perdita californica April - June, timed to blooming of Mariposa Lily Read More California Mountain Digger Bee Habropoda depressa February - early June Read More California Poppy Fairy Bee Perdita interrupta April - June, timed to blooming of California Poppy Read More California Resin-Leafcutter Bee Trachusa perdita April - June Read More California Rotund-Resin Bee Anthidiellum notatum robertsonii May - August Read More Chelostoma californicum Scissor Bee Chelostoma californicum April - June Read More Colletes Cellophane Bees Colletes March - Fall Read More Dark Bees Stelis April - June Read More Dianthidium Dianthidium Late May - August Read More Edwards Digger Bee Anthophora edwardsii Earlier Spring (starting late-February/early March) Read More Edwards Melectum Melecta edwardsii March - early June Read More Eucera Longhorn Bee Eucera March to June Read More Foothill Carpenter Bee Xylocopa tabaniformis orpifex Later March - June Read More Hoplitis Mason Bee Hoplitis April - early June. Read More Hylaeus Masked Bees Hylaeus April - September Read More Lasioglossum Lasioglossum Early Spring – Fall Read More Lovely-tailed Mourning Bee Melecta separata callura March - May Read More Megachile Leafcutter Bee Megachile Summer Read More Melissodes Longhorn Bee Melissodes Late Summer to Fall Read More Nomad Bees Nomada February - June Read More Osmia Mason Bee Osmia Primarily April - June, but Osmia ribifloris biedermannii appears from January. Read More Pacific Digger Bee Anthophora pacifica February and March - not common. Read More Panurginus Miner Bee Panurginus Early Spring Read More Prong-faced Slender-Mason Bee Protosmia rubifloris April - August Read More Red-tailed Micro-Shortface Bee Micralictoides ruficaudus April and May Read More Small Carpenter Bee Ceratina March - July Read More Tripartite Sweat Bee Halictus tripartitus March - November Read More Urbane Digger Bee Anthophora urbana Late Spring - Early Fall Read More Valley Carpenter Bee Xylocopa sonorina March – September (Uncommon on Mount Diablo) Read More Yellow-faced Bumble Bee Bombus vosnesenskii January - September Read More

articles about plants wildlife spiders mammals insects Articles Filter by Category Select Category Pepsis Tarantula Hawk Has Found Its Prey While most of us “Mount Diablo-philes” have a great love for our local tarantulas, I am also enamored with Tarantula Hawks – those large, magnetic blue-black wasps with the orange wings! July 5, 2025 More Hoverflies Hoverflies are Flies in Disguise June 24, 2025 More Jeweled Spider Flies One of my favorite insects is quite uncommon ... June 20, 2025 More Pollen Wasp It isn’t a pest or a predator - this Pollen Wasp behaves more like a bee... June 20, 2025 More Crab Spider Crab Spiders Use Flower Power May 28, 2025 More Acorn Woodpecker A bird that's nut for acorns! May 21, 2025 More Coyote The barking dog May 21, 2025 More Dragonfly Oh my! What big eyes you have! May 21, 2025 More 1 2 3 4 5 1 ... 1 2 3 4 5 6 7 8 9 10 11 ... 11

Diggers, Bumbles, Longhorn, and Nomad Bees Black-tailed Bumble Bee Bombus melanopygus January - July (rarely as early as December) Read More California Bumble Bee Bombus californicus February - September Read More Yellow-faced Bumble Bee Bombus vosnesenskii January - September Read More Foothill Carpenter Bee Xylocopa tabaniformis orpifex Later March - June Read More Small Carpenter Bee Ceratina March - July Read More Valley Carpenter Bee Xylocopa sonorina March – September (Uncommon on Mount Diablo) Read More California Digger-cuckoo Bee Brachymelecta californica June - August Read More Edwards Melectum Melecta edwardsii March - early June Read More Lovely-tailed Mourning Bee Melecta separata callura March - May Read More Nomad Bees Nomada February - June Read More California Digger Bee Anthophora californicus February - May; there may be a Fall generation too Read More California Mountain Digger Bee Habropoda depressa February - early June Read More Edwards Digger Bee Anthophora edwardsii Earlier Spring (starting late-February/early March) Read More Pacific Digger Bee Anthophora pacifica February and March - not common. Read More Urbane Digger Bee Anthophora urbana Late Spring - Early Fall Read More Eucera Longhorn Bee Eucera March to June Read More Melissodes Longhorn Bee Melissodes Late Summer to Fall Read More Bindweed Turret Bee Diadasia bituberculata April to June Read More

Fairy and Miner Bees California Fairy Bee Perdita californica April - June, timed to blooming of Mariposa Lily Read More California Poppy Fairy Bee Perdita interrupta April - June, timed to blooming of California Poppy Read More Andrena Miner Bee Andrena January - Fall (but primarily January - April) Read More Panurginus Miner Bee Panurginus Early Spring Read More

Wildflower Mount Diablo Common Eucrypta Scientific Name: Eucrypta chrysanthemifolia var. chrysanthemifolia Family: Boraginaceae (Borage Family) Blooms: Apr - May Color: White Annual herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Ken-ichi Ueda, iNaturalist

Wildflower Mount Diablo Brickell bush, California brickellbush, California brickellia Scientific Name: Brickellia californica Family: Asteraceae (Sunflower Family) Blooms: August Color: Yellow-Orange Perennial herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Steven Beatty

Wildflower Mount Diablo Bracted Popcornflower Scientific Name: Plagiobothrys bracteatus Family: Boraginaceae (Borage Family) Blooms: Apr-May Color: White Annual herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Daniel Fitzgerald Daniel Fitzgerald

Wildflower Mount Diablo Valley Spurge Scientific Name: Chamaesyce ocellata ssp. ocellata Family: Euphorbiacae (Spurge Family) Blooms: May-Oct Color: Yellow-Orange Annual or perennial herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants

Wildflower Mount Diablo Alkali Mallow Scientific Name: Malvella leprosa Family: Malvaceae Blooms: Apr-Oct Color: White Perennial herb Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants

Wildflower Mount Diablo Golden Yarrow Scientific Name: Eriophyllum confertiflorum var. confertiflorum Family: Asteraceae (Sunflower Family) Blooms: May - Jun Color: Yellow-Orange Shrub Native Jump to Blooming Now Blue / Purple Red / Pink White Yellow / Orange Invasive Plants Kevin Hintsa