Bare-saddled Blood Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 706
- Scientific name
- Sphecodes ephippius
Eccentric Grass Snail
- Group
- Molluscs
- Records since 2000
- 703
- Scientific name
- Vallonia excentrica
Rhamphomyia crassirostris
- Group
- True flies
- Records since 2000
- 701
- Peak month
- May
Ash-black Slug
- Group
- Molluscs
- Records since 2000
- 699
- Scientific name
- Limax cinereoniger
Common Bistort
- Group
- Flowering plants
- Records since 2000
- 692
- Scientific name
- Bistorta officinalis
European Serin
- Group
- Birds
- Records since 2000
- 688
- Scientific name
- Serinus serinus
Pocket Plum
- Group
- Fungi
- Records since 2000
- 688
- Scientific name
- Taphrina pruni
Slender Parsley-piert
- Group
- Flowering plants
- Records since 2000
- 685
- Scientific name
- Aphanes australis
Cheirocratus intermedius
- Group
- Crustaceans
- Records since 2000
- 684
- Peak month
- May
European chickweed
- Group
- Flowering plants
- Records since 2000
- 682
- Scientific name
- Stellaria palustris
Catinaria lichen
- Group
- Lichens
- Records since 2000
- 681
- Scientific name
- Catinaria atropurpurea
Northern Winter Moth
- Group
- Butterflies and moths
- Records since 2000
- 678
- Scientific name
- Operophtera fagata
Root-maggot Fly
- Group
- True flies
- Records since 2000
- 676
- Scientific name
- Hydrophoria lancifer
Gerris thoracicus
- Group
- True bugs
- Records since 2000
- 675
- Peak month
- May
Horned Tree Hopper
- Group
- True bugs
- Records since 2000
- 675
- Scientific name
- Centrotus cornuta
Capped Orb Mussel
- Group
- Molluscs
- Records since 2000
- 671
- Scientific name
- Musculium lacustre
Prasocuris marginella
- Group
- Beetles
- Records since 2000
- 668
- Peak month
- May
Tubificoides swirencoides
- Group
- Worms (annelids)
- Records since 2000
- 667
- Peak month
- May
Pseudoparatanais batei
- Group
- Crustaceans
- Records since 2000
- 666
- Peak month
- May
Common horned dung beetle
- Group
- Beetles
- Records since 2000
- 665
- Scientific name
- Onthophagus similis
Rape
- Group
- Flowering plants
- Records since 2000
- 665
- Scientific name
- Brassica rapa
Dicranomyia fusca
- Group
- True flies
- Records since 2000
- 664
- Peak month
- May
Heath Navel
- Group
- Fungi
- Records since 2000
- 664
- Scientific name
- Lichenomphalia umbellifera
Large Meadow Fly
- Group
- True flies
- Records since 2000
- 664
- Scientific name
- Chrysotoxum cautum
Myriochele danielsseni
- Group
- Worms (annelids)
- Records since 2000
- 664
- Peak month
- May
Byturus ochraceus
- Group
- Beetles
- Records since 2000
- 662
- Peak month
- May
Adria Bellflower
- Group
- Flowering plants
- Records since 2000
- 661
- Scientific name
- Campanula portenschlagiana
Three-toothed Moss Snail
- Group
- Molluscs
- Records since 2000
- 661
- Scientific name
- Azeca goodalli
White Helleborine
- Group
- Flowering plants
- Records since 2000
- 661
- Scientific name
- Cephalanthera damasonium
Malthodes marginatus
- Group
- Beetles
- Records since 2000
- 660
- Peak month
- May
Grass and Cereal Powdery Mildew
- Group
- Fungi
- Records since 2000
- 658
- Scientific name
- Blumeria graminis
Iberian Chiffchaff
- Group
- Birds
- Records since 2000
- 658
- Scientific name
- Phylloscopus ibericus
Girdled Mining Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 657
- Scientific name
- Andrena labiata
Weevil
- Group
- Beetles
- Records since 2000
- 654
- Scientific name
- Mecinus pyraster
Cordilura albipes
- Group
- True flies
- Records since 2000
- 653
- Peak month
- May
Coniocarpon fallax
- Group
- Lichens
- Records since 2000
- 652
- Peak month
- May
Pyripora catenularia
- Group
- Bryozoans
- Records since 2000
- 652
- Peak month
- May
Anthonomus pedicularius
- Group
- Beetles
- Records since 2000
- 648
- Peak month
- May
Box-headed Blood Bee
- Group
- Bees, wasps and ants
- Records since 2000
- 648
- Scientific name
- Sphecodes monilicornis
Orca
- Group
- Mammals
- Records since 2000
- 647
- Scientific name
- Orcinus orca
Brittle Bladder-fern
- Group
- Ferns and horsetails
- Records since 2000
- 643
- Scientific name
- Cystopteris fragilis
Cionus tuberculosus
- Group
- Beetles
- Records since 2000
- 642
- Peak month
- May
Leptospora rubella
- Group
- Fungi
- Records since 2000
- 639
- Peak month
- May
Wart lichen
- Group
- Fungi
- Records since 2000
- 639
- Scientific name
- Pyrenula occidentalis
Meadow-foam
- Group
- Flowering plants
- Records since 2000
- 636
- Scientific name
- Limnanthes douglasii
Biatora epixanthoides
- Group
- Lichens
- Records since 2000
- 631
- Peak month
- May
Scathophaga inquinata
- Group
- True flies
- Records since 2000
- 631
- Peak month
- May
Belted click beetle
- Group
- Beetles
- Records since 2000
- 627
- Scientific name
- Ampedus balteatus