The best time to encourage a developer to make a scheme more nature friendly is at the pre-application stage. Community consultations (usually carried out for larger developments) are a great opportunity to speak to the developer and their consultants and share your ideas.
However, you can still influence a development proposal once the application has been submitted. Check the application documents to see if any nature friendly features have been included as part of the design. If they are missing, or you feel they are inadequate, let the Planning Officer know by submitting comments on how the proposal could be improved for nature. Refer to local and national planning policies for protecting and enhancing biodiversity to help support your case.
If you are aware of any particularly important or less common species present in the area, either through local knowledge or the ecological assessment submitted with the planning application, you could suggest that the proposal provides certain plants and features that could benefit the specific needs of those species. For example, Swift and bat bricks or House Martin nesting cups can ensure that these species are supported within the new development.
Similarly, planting certain species can support butterflies and moths, such as Holly and Ivy which provide excellent foodplants for the Holly Blue butterfly (found throughout most of England, Wales and Northern Ireland and infrequently in Scotland). You can also ask for nectar-rich planting schemes that help pollinators move through a development.
To make the biggest impact for nature, a planning design needs to provide these features throughout the development, not just in corners. Developers should be ambitious with their nature friendly features, not sparing.