Phenology chains

Visible terrestrial events (blossom, leaf-out, flowering) are proxies for the same environmental drivers that trigger invisible aquatic events (hatches, pondweed growth, spawning). When you log an observation of any event in a chain, downstream events get predicted forwards by the typical lag. Refines per-venue as your dataset grows.

flowchart LR
    bloodworm_emergence["Chironomid (bloodworm) main emergence"] -->|28d| perch_spawn["Perch spawning"]
    mayfly_danica["Mayfly main hatch"] -->|14d| tench_spawn["Tench spawning"]
    canadian_pondweed_grow["Canadian pondweed growth resumes"] -->|21d| bloodworm_emergence["Chironomid (bloodworm) main emergence"]
    marsh_marigold["Marsh marigold flowering"] -->|14d| tadpole_emerge["Tadpole emergence from spawn"]
    swift_arrive["Swifts arrive"] -->|21d| mayfly_danica["Mayfly main hatch"]
    blackberry_ripe["Blackberries ripe"] -->|14d| daddy_longlegs["Crane fly / daddy-long-legs"]
    blackthorn["Blackthorn blossom"] -->|28d| hawthorn_blossom["Hawthorn (May) blossom"]
    cherry_plum["Cherry plum blossom"] -->|10d| phantom_midge["Phantom midge"]
    common_comfrey["Common comfrey flowering"] -->|0d| damselfly_emergence["Damselfly emergence (mixed spp.)"]
    conker_fall["Conkers fall"] -->|28d| trout_spawn["Brown trout spawning"]
    daffodil["Daffodil flowering"] -->|14d| canadian_pondweed_grow["Canadian pondweed growth resumes"]
    elder_flower["Elder flower"] -->|0d| damselfly_emergence["Damselfly emergence (mixed spp.)"]
    foxglove["Foxglove flowering"] -->|7d| caenis["Caenis 'angler's curse'"]
    hawthorn_blossom["Hawthorn (May) blossom"] -->|0d| hawthorn_fly["Hawthorn fly"]
    hawthorn_blossom["Hawthorn (May) blossom"] -->|21d| mayfly_danica["Mayfly main hatch"]
    snowdrop["Snowdrop flowering"] -->|21d| frog_spawn["Frog spawn"]

  
    class bloodworm_emergence cat-aquatic_insect
    class perch_spawn cat-fish_behaviour
    class mayfly_danica cat-aquatic_insect
    class tench_spawn cat-fish_behaviour
    class canadian_pondweed_grow cat-aquatic_plant
    class bloodworm_emergence cat-aquatic_insect
    class marsh_marigold cat-aquatic_plant
    class tadpole_emerge cat-amphibian
    class swift_arrive cat-bird
    class mayfly_danica cat-aquatic_insect
    class blackberry_ripe cat-terrestrial_flora
    class daddy_longlegs cat-aquatic_insect
    class blackthorn cat-terrestrial_flora
    class hawthorn_blossom cat-terrestrial_flora
    class cherry_plum cat-terrestrial_flora
    class phantom_midge cat-aquatic_insect
    class common_comfrey cat-terrestrial_flora
    class damselfly_emergence cat-aquatic_insect
    class conker_fall cat-terrestrial_flora
    class trout_spawn cat-fish_behaviour
    class daffodil cat-terrestrial_flora
    class canadian_pondweed_grow cat-aquatic_plant
    class elder_flower cat-terrestrial_flora
    class damselfly_emergence cat-aquatic_insect
    class foxglove cat-terrestrial_flora
    class caenis cat-aquatic_insect
    class hawthorn_blossom cat-terrestrial_flora
    class hawthorn_fly cat-aquatic_insect
    class hawthorn_blossom cat-terrestrial_flora
    class mayfly_danica cat-aquatic_insect
    class snowdrop cat-terrestrial_flora
    class frog_spawn cat-amphibian
    classDef cat-aquatic_insect fill:#fff7ed,stroke:#b45309,color:#7c2d12
    classDef cat-aquatic_plant fill:#ecfdf5,stroke:#047857,color:#064e3b
    classDef cat-fish_behaviour fill:#dbeafe,stroke:#1d4ed8,color:#1e3a8a
    classDef cat-amphibian fill:#dcfce7,stroke:#15803d,color:#14532d
    classDef cat-terrestrial_flora fill:#fef3c7,stroke:#a16207,color:#713f12
    classDef cat-bird fill:#fce7f3,stroke:#be185d,color:#831843
  

All chain edges (16)