Asian Large Skipper
- Group
- Butterflies and moths
- Peak month
- July
- Records since 2000
- 205,385
Described in 1853
52 species
Ampelisca brevicornis
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 3,740
Ampelisca diadema
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 3,658
Trivial plant bug
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 2,429
Centropages hamatus
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 1,572
Chinese Mitten Crab
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 1,519
Lobe-spurred Furrow Bee
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 1,086
Shore Feather Duster Worm
- Group
- Worms (annelids)
- Peak month
- August
- Records since 2000
- 1,044
Encyonema gracile
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 548
Furry-claspered Furrow Bee
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 527
Nitzschia linearis
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 456
Synedra radians
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 424
Pista maculata
- Group
- Worms (annelids)
- Peak month
- May
- Records since 2000
- 416
Lasioglossum punctatissimum
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 402
Monocorophium acherusicum
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 386
Miridius quadrivirgatus
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 376
Iteomyia capreae
- Group
- True flies
- Peak month
- August
- Records since 2000
- 369
Orchesia undulata
- Group
- Beetles
- Peak month
- July
- Records since 2000
- 367
Orchomene humilis
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 353
Palliduphantes ericaeus
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 326
Rhyzobius forestieri
- Group
- Beetles
- Peak month
- August
- Records since 2000
- 315
Neoamphitrite figulus
- Group
- Worms (annelids)
- Peak month
- March
- Records since 2000
- 298
Lasioglossum parvulum
- Group
- Bees, wasps and ants
- Peak month
- May
- Records since 2000
- 269
Nitzschia acicularis
- Group
- Seaweeds and algae
- Peak month
- May
- Records since 2000
- 266
Dasineura crataegi
- Group
- True flies
- Peak month
- September
- Records since 2000
- 243
Neon reticulatus
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 240
Long-Toed Stint
- Group
- Birds
- Peak month
- October
- Records since 2000
- 227
Gammaropsis nitida
- Group
- Crustaceans
- Peak month
- July
- Records since 2000
- 220
Orthops basalis
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 211
Cercyon marinus
- Group
- Beetles
- Peak month
- May
- Records since 2000
- 205
Frustulia saxonica
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 169
Chloriona smaragdula
- Group
- True bugs
- Peak month
- June
- Records since 2000
- 158
Eupteryx filicum
- Group
- True bugs
- Peak month
- July
- Records since 2000
- 146
Gyrosigma acuminatum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 145
Colletes similis
- Group
- Bees, wasps and ants
- Peak month
- July
- Records since 2000
- 141
Tenuiphantes alacris
- Group
- Spiders
- Peak month
- September
- Records since 2000
- 136
Agromyza idaeiana
- Group
- True flies
- Peak month
- October
- Records since 2000
- 127
Mesacmaea mitchellii
- Group
- Jellyfish, corals and anemones
- Peak month
- January
- Records since 2000
- 124
Philonthus tenuicornis
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 116
Nitzschia closterium
- Group
- Seaweeds and algae
- Peak month
- April
- Records since 2000
- 97
Balanophyllia regia
- Group
- Jellyfish, corals and anemones
- Peak month
- July
- Records since 2000
- 91
Stylostomum ellipse
- Group
- Flatworms
- Peak month
- May
- Records since 2000
- 80
Microdeutopus gryllotalpa
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 76
Walckenaeria vigilax
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 70
Myllaena infuscata
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 69
Aequorea vitrina
- Group
- Jellyfish, corals and anemones
- Peak month
- August
- Records since 2000
- 65
Hyperaspis pseudopustulata
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 59
Harmandiola tremulae
- Group
- True flies
- Peak month
- September
- Records since 2000
- 58
Pseudoperichaeta nigrolineata
- Group
- True flies
- Peak month
- July
- Records since 2000
- 56
Gyrosigma attenuatum
- Group
- Seaweeds and algae
- Peak month
- September
- Records since 2000
- 55
Pikea californica
- Group
- Seaweeds and algae
- Peak month
- March
- Records since 2000
- 53
Oedothorax agrestis
- Group
- Spiders
- Peak month
- June
- Records since 2000
- 51