1. Seeds: Chaffinches mainly consume a variety of seeds from various plants and grasses, including sunflower seeds, thistle seeds, canary seeds, and seeds from weeds such as dandelion and chickweed.
2. Insects: During the breeding season and especially when feeding their young, chaffinches also eat a variety of insects. These include caterpillars, beetles, spiders, flies, and aphids. Insect consumption provides essential protein for growing chicks.
3. Berries and Fruits: Chaffinches occasionally feed on berries and fruits, such as elderberries, blackberries, and raspberries, when these are available.
4. Nectar: In some cases, chaffinches have been observed drinking nectar from flowers, particularly during the spring and summer months when nectar is abundant.
5. Bread and Kitchen Scraps: Chaffinches are known to visit bird feeders and will consume bread crumbs, oatmeal, and other kitchen scraps that are put out for birds.
It's worth noting that chaffinches have strong beaks that are adapted for cracking seeds, but they also possess a flexible diet and can adapt to different food sources based on availability and season. Their diet can vary depending on the habitat they inhabit and the availability of different food items.