Which Tree

susieelizabethcook-BLmjNEh

Hello I would like to ask for advice I'm not much of a gardener  but my dad loves his garden and the wildlife in it. for his birthday is would like to buy him a nut tree for him to enjoy aswell as the birds in the garden . He is red green colour blind so I want to avoid anything that blooms red against green and his soil is clay and wet so which tree should I buy him?

Bilje

Don't know if this helps but I've got two rowan trees 35 years old but aren't too high or wide. I have heavy clay and garden in NE England.
They have attractive Spring buds which open to leaves obviously but in May sprays of creamy white flower heads which are delicately scented. These produce lovely red berries in late summer. I know the colour is a downside in your Dads case but boy o boy do they attract the birds, blackbirds especially in my garden . Their antics are very entertaining. 
Lots of bird activity in the Spring bluetits etc which I assume are picking insects off, currently I have a robin which perches on the topmost twig and sings his heart out. 

Cambridgerose12

I don’t think there are many nut bearing trees that will feed birds. You’d be better off with a berrying  shrub or small tree like Cotoneaster lacteus or holly, Amelanchier or rowan. There are some lovely forms of rowan out there, check out ‘Joseph Rock’.

Bilje

Sorry i didn't read your original post properly I didn't realise you were looking for a nut tree when I suggested a rowan