Microcara testacea
- Group
- Beetles
- Records since 2000
- 567
- Peak month
- May
Rodgersia
- Group
- Flowering plants
- Records since 2000
- 567
- Scientific name
- Rodgersia podophylla
Mycobilimbia sphaeroides
- Group
- Lichens
- Records since 2000
- 564
- Peak month
- May
Northern Dune Tiger Beetle
- Group
- Beetles
- Records since 2000
- 563
- Scientific name
- Cicindela hybrida
Ant Beetle
- Group
- Beetles
- Records since 2000
- 562
- Scientific name
- Thanasimus formicarius
Eudorellopsis deformis
- Group
- Crustaceans
- Records since 2000
- 561
- Peak month
- May
Melampsora epitea
- Group
- Fungi
- Records since 2000
- 561
- Peak month
- May
Mycoporum antecellens
- Group
- Fungi
- Records since 2000
- 561
- Peak month
- May
Toothless Chrysalis Snail
- Group
- Molluscs
- Records since 2000
- 561
- Scientific name
- Columella edentula
Cirratulus caudatus
- Group
- Worms (annelids)
- Records since 2000
- 559
- Peak month
- May
Clapper Hydroid
- Group
- Jellyfish, corals and anemones
- Records since 2000
- 559
- Scientific name
- Sarsia tubulosa
Common Water-crowfoot
- Group
- Flowering plants
- Records since 2000
- 555
- Scientific name
- Ranunculus aquatilis
Cis boleti
- Group
- Beetles
- Records since 2000
- 553
- Peak month
- May
Euphylidorea meigenii
- Group
- True flies
- Records since 2000
- 551
- Peak month
- May
Enterographa zonata
- Group
- Lichens
- Records since 2000
- 550
- Peak month
- May
Tinodes unicolor
- Group
- Caddisflies
- Records since 2000
- 548
- Peak month
- May
Ochrolechia microstictoides
- Group
- Lichens
- Records since 2000
- 547
- Peak month
- May
White-winged scoter
- Group
- Birds
- Records since 2000
- 547
- Scientific name
- Melanitta deglandi
Akanthophoreus gracilis
- Group
- Crustaceans
- Records since 2000
- 545
- Peak month
- May
Bur Chervil
- Group
- Flowering plants
- Records since 2000
- 545
- Scientific name
- Anthriscus caucalis
Brachypterus glaber
- Group
- Beetles
- Records since 2000
- 544
- Peak month
- May
Syntomus obscuroguttatus
- Group
- Beetles
- Records since 2000
- 543
- Peak month
- May
Common Fox Spider
- Group
- Spiders
- Records since 2000
- 541
- Scientific name
- Alopecosa pulverulenta
Parougia caeca
- Group
- Worms (annelids)
- Records since 2000
- 541
- Peak month
- May
Yellow-legged Water-snipefly
- Group
- True flies
- Records since 2000
- 540
- Scientific name
- Atherix ibis
Lesser Diving-beetle
- Group
- Beetles
- Records since 2000
- 538
- Scientific name
- Acilius sulcatus
Frosty-rimmed Dot Lichen
- Group
- Lichens
- Records since 2000
- 537
- Scientific name
- Bacidia rubella
Knotweed leaf beetle
- Group
- Beetles
- Records since 2000
- 536
- Scientific name
- Gastrophysa polygoni
Buff-tailed Bear Hoverfly
- Group
- True flies
- Records since 2000
- 534
- Scientific name
- Criorhina floccosa
Cypress Spurge
- Group
- Flowering plants
- Records since 2000
- 534
- Scientific name
- Euphorbia cyparissias
Copromyza stercoraria
- Group
- True flies
- Records since 2000
- 531
- Peak month
- May
Eurasian Running Crab Spider
- Group
- Spiders
- Records since 2000
- 530
- Scientific name
- Philodromus dispar
Hydroporus umbrosus
- Group
- Beetles
- Records since 2000
- 530
- Peak month
- May
Orthocladius van-der
- Group
- True flies
- Records since 2000
- 530
- Peak month
- May
Prickly Snail
- Group
- Molluscs
- Records since 2000
- 530
- Scientific name
- Acanthinula aculeata
Scolopostethus affinis
- Group
- True bugs
- Records since 2000
- 530
- Peak month
- May
Bryony Ladybird
- Group
- Beetles
- Records since 2000
- 529
- Scientific name
- Henosepilachna argus
Furry-claspered Furrow Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 527
- Scientific name
- Lasioglossum lativentre
Archarius pyrrhoceras
- Group
- Beetles
- Records since 2000
- 523
- Peak month
- May
Turnip Flea Beetle
- Group
- Beetles
- Records since 2000
- 523
- Scientific name
- Phyllotreta nigripes
Lomentaria clavellosa
- Group
- Seaweeds and algae
- Records since 2000
- 522
- Peak month
- May
Cerylon ferrugineum
- Group
- Beetles
- Records since 2000
- 520
- Peak month
- May
Orange-sided comb-horn
- Group
- True flies
- Records since 2000
- 520
- Scientific name
- Ctenophora pectinicornis
Hooded Merganser
- Group
- Birds
- Records since 2000
- 519
- Scientific name
- Lophodytes cucullatus
Beanweed
- Group
- Seaweeds and algae
- Records since 2000
- 517
- Scientific name
- Scytosiphon lomentaria
Curculio venosus
- Group
- Beetles
- Records since 2000
- 517
- Peak month
- May
Dilophus femoratus
- Group
- True flies
- Records since 2000
- 517
- Peak month
- May
Metallic horned dung beetle
- Group
- Beetles
- Records since 2000
- 517
- Scientific name
- Onthophagus coenobita