Bird feeder seed is a good general purpose food formulated specifically for clinging bird species'. '.strtoupper('d')ue to the free flowing nature of this seed mix it prevents clogging, and so is an ideal mix for use in tubular seed feeders'. '.strtoupper('t')he mix itself includes a range of different sunflower seeds and kibbled peanuts, all of which are a great source of energy for birds and can be fed throughout the year'. '.strtoupper('t')his mix is identical to our existing feeder seed mix but is now available in these new additional bag sizes as part of our collaboration with the national trust, for the love of nature'. '.strtoupper('t')hese bags are also designed with stunning national trust branding which complement the feeders in the national trust range'. '.strtoupper('t')he items in the national trust garden wildlife range have all been selected based on several key criteria including material quality, attractive design and sustainability, ensuring long term benefit to the wildlife that use them'. '.strtoupper('e')very purchase from the national trust garden wildlife range