There are a lot of yellows in the garden in April: forsythia, various narcissi, primroses, Lesser celandine, the first few dandelions, gorse, Common Tamarisk Moss, the flowering catkins of Grey Sallow. This morning I wondered about red or reddish things. Here are a few I found today.
I saw a peacock butterfly on Lesser Celandine. Plenty of reds in that species :)