Broad-Billed Sandpiper
- Group
- Birds
- Records since 2000
- 304
- Scientific name
- Calidris falcinellus
Euglesa obtusalis
- Group
- Molluscs
- Records since 2000
- 304
- Peak month
- May
Giant Sequoia
- Group
- Conifers
- Records since 2000
- 304
- Scientific name
- Sequoiadendron giganteum
Jania rubens
- Group
- Seaweeds and algae
- Records since 2000
- 304
- Peak month
- May
Narrow-Leaved Helleborine
- Group
- Flowering plants
- Records since 2000
- 304
- Scientific name
- Cephalanthera longifolia
Odostomia turrita
- Group
- Molluscs
- Records since 2000
- 303
- Peak month
- May
Alderina imbellis
- Group
- Bryozoans
- Records since 2000
- 302
- Peak month
- May
Dolerus aeneus
- Group
- Bees, wasps and ants
- Records since 2000
- 302
- Peak month
- May
Cercyon ustulatus
- Group
- Beetles
- Records since 2000
- 300
- Peak month
- May
Chelostoma florisomne
- Group
- Bees, wasps and ants
- Records since 2000
- 300
- Peak month
- May
Iophon nigricans
- Group
- Sponges
- Records since 2000
- 300
- Peak month
- May
Bacidina phacodes
- Group
- Lichens
- Records since 2000
- 299
- Peak month
- May
Lasiopogon cinctus
- Group
- True flies
- Records since 2000
- 299
- Peak month
- May
Psylliodes affinis
- Group
- Beetles
- Records since 2000
- 299
- Peak month
- May
Smith's Pepperwort
- Group
- Flowering plants
- Records since 2000
- 299
- Scientific name
- Lepidium heterophyllum
Vincenzellus ruficollis
- Group
- Beetles
- Records since 2000
- 299
- Peak month
- May
Leptothorax nylanderi
- Group
- Bees, wasps and ants
- Records since 2000
- 298
- Peak month
- May
Sphaerodoridium minutum
- Group
- Worms (annelids)
- Records since 2000
- 298
- Peak month
- May
Uleiota planatus
- Group
- Beetles
- Records since 2000
- 298
- Peak month
- May
Arge ustulata
- Group
- Bees, wasps and ants
- Records since 2000
- 297
- Peak month
- May
Pipiza festiva
- Group
- True flies
- Records since 2000
- 297
- Peak month
- May
Aradus depressus
- Group
- True bugs
- Records since 2000
- 296
- Peak month
- May
Bembidion gilvipes
- Group
- Beetles
- Records since 2000
- 296
- Peak month
- May
Cratyna brevispina
- Group
- True flies
- Records since 2000
- 296
- Peak month
- May
Hydaticus seminiger
- Group
- Beetles
- Records since 2000
- 296
- Peak month
- May
Large-mouthed Valve Snail
- Group
- Molluscs
- Records since 2000
- 295
- Scientific name
- Valvata macrostoma
Papaver atlanticum
- Group
- Flowering plants
- Records since 2000
- 295
- Peak month
- May
Window Gnat
- Group
- True flies
- Records since 2000
- 295
- Scientific name
- Sylvicola fenestralis
Black moss beetle
- Group
- Beetles
- Records since 2000
- 294
- Scientific name
- Hydraena nigrita
Broad Bean
- Group
- Flowering plants
- Records since 2000
- 294
- Scientific name
- Vicia faba
Incurvaria masculella
- Group
- Butterflies and moths
- Records since 2000
- 294
- Peak month
- May
Cyrtidula quercus
- Group
- Fungi
- Records since 2000
- 293
- Peak month
- May
Mud pond snail
- Group
- Molluscs
- Records since 2000
- 293
- Scientific name
- Omphiscola glabra
A Lichen
- Group
- Lichens
- Records since 2000
- 292
- Scientific name
- Micarea xanthonica
Pertusaria pupillaris
- Group
- Lichens
- Records since 2000
- 292
- Peak month
- May
Chylocladia verticillata
- Group
- Seaweeds and algae
- Records since 2000
- 290
- Peak month
- May
Ephemera vulgata
- Group
- Mayflies
- Records since 2000
- 290
- Peak month
- May
A Lichen
- Group
- Fungi
- Records since 2000
- 289
- Scientific name
- Pyrenula laevigata
Polydrusus tereticollis
- Group
- Beetles
- Records since 2000
- 289
- Peak month
- May
Microdeutopus versiculatus
- Group
- Crustaceans
- Records since 2000
- 288
- Peak month
- May
Molophilus ater
- Group
- True flies
- Records since 2000
- 288
- Peak month
- May
Coccidula scutellata
- Group
- Beetles
- Records since 2000
- 287
- Peak month
- May
Pale november moth
- Group
- Butterflies and moths
- Records since 2000
- 287
- Scientific name
- Epirrita christyi
Milesina blechni
- Group
- Fungi
- Records since 2000
- 286
- Peak month
- May
Brachycaudus klugkisti
- Group
- True bugs
- Records since 2000
- 284
- Peak month
- May
Buttoned snout
- Group
- Butterflies and moths
- Records since 2000
- 283
- Scientific name
- Hypena rostralis
Cacopsylla peregrina
- Group
- True bugs
- Records since 2000
- 283
- Peak month
- May
Drab looper
- Group
- Butterflies and moths
- Records since 2000
- 283
- Scientific name
- Minoa murinata