© Tim Callaway
Survey calendar
Survey calendar
Key
Optimal
Sub-optimal
Not Recommended
| Species | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Badgers | Surveys can take place at any time of year (vegetation limits visibility in summer; activity above ground in winter) | |||||||||||
Bats - Initial | Initial bat roost assessment of buildings and trees can take place all year; winter months preferable for trees | |||||||||||
Bats - Roosting | Hibernation surveys only | Transition roost surveys | Dawn / Dusk Bat presence / Likely absence surveys and activity surveys. Multiple visits spaced across the season | Mating roost surveys | Hibernation surveys only | |||||||
Birds - Breeding | Multiple visits spaces across the season | |||||||||||
Birds - Wintering | Multiple visits across the season | Multiple visits across the season | ||||||||||
Botanicals | Mosses, liverworts and lichens only | Surveys for higher plants and ferns. Timing varies depending on habitat | Mosses, liverworts and lichens only | |||||||||
Dormice | Nest tube surveys: multiple visits between April and November | |||||||||||
Great Crested Newts - HSI | Initial Habitat Suitability Index (HSI) surveys can take place at any time of year | |||||||||||
Great Crested Newts - eDNA | eDNA surveys: Apr - Jun. std survey: multiple visits between Mar - Jun (core period mid-Apr to mid-May) | |||||||||||
Invertebrates | Multiple visits required throughout season, timings will vary between species | |||||||||||
Prelim Appraisal / Habitats & Vegetation | ||||||||||||
Otters | Surveys can take place at any time of year (although weather and vegetation cover may be limiting factors) | |||||||||||
Reptiles | Multiple visits spaced across the season | Multiple visits | ||||||||||
Water Voles | First visit required April - June; Second visit July - September | |||||||||||
Mitigation calendar
Key
Possible
Constraints
| Species | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Badgers | Building of artificial setts only. No disturbance of existing setts | Stopping up or destruction of exiting setts | As Jan-Jun | |||||||||
Bats | Works on maternity roosts only | Maternity and summer roosts until May. Hibernation roosts from Mar / Apr depemnding on size / location | Works on hibernation only | Hibernation until Oct. Maternity from Oct. Summer from Sept | Works on maternity and summer roosts only. | |||||||
Birds | Clearance works map occur but must stop if nesting birds are found. | Avoid clearance of suitable habitat if possible (if unavoidable tehn additions surveys / ECoW may be required) | Clearance works may occur but must stop if nesting birds are found. | |||||||||
Dormice | Above ground vegetation clearance only | Removal of stumps, roots and other ground level clearance if above ground vegetation was removed over the winter months. | Clearance works to early October | Above ground vegetation clearance only | ||||||||
Great Crested Newts | Pond management only | Newt trappings in ponds and on land | Newt trappings on land only | Pond management only | ||||||||
Habitats and Vegetation | Plantin and translocation | No migration for majority of species | Plantin and translocation | |||||||||
Otters | No seasonal constraints. Likely to be restricted where otters are found to be breeding | |||||||||||
Reptiles | Vegetation clearance only. No disturbance of hibernation features | Staged vegetation clearance only. Reptile trappings can be conducted throughout this period. Activity limited by high temperatures in July / August | Vegetation clearance only. No disturbance of hibernation features | |||||||||
Water Voles | Avoid all work within water vole habitat | Exclusion and works possible | Avoid all work within water vole habitat | Exclusion and works possible | Avoid all work within water vole habitat | |||||||