Square-tailed Worm
- Group
- Worms (annelids)
- Peak month
- April
- Records since 2000
- 4,751
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- Species by county
- Peterborough
Species recorded in Peterborough
249 species
Peterborough — county
Sigara dorsalis
- Group
- True bugs
- Peak month
- September
- Records since 2000
- 4,037
Zebra Mussel
- Group
- Molluscs
- Peak month
- May
- Records since 2000
- 3,352
Caspian mud shrimp
- Group
- Crustaceans
- Peak month
- May
- Records since 2000
- 3,122
Tiger Cranefly
- Group
- True flies
- Peak month
- June
- Records since 2000
- 3,100
Varied Carpet Beetle
- Group
- Beetles
- Peak month
- June
- Records since 2000
- 2,765
Pouting Woodlouse-fly
- Group
- True flies
- Peak month
- July
- Records since 2000
- 2,710
Chinese Mitten Crab
- Group
- Crustaceans
- Peak month
- September
- Records since 2000
- 1,519
Chinese Water Deer
- Group
- Mammals
- Peak month
- April
- Records since 2000
- 941