You can use any yarn for this robbin with the correct hook size, I used style craft dk with a 3mm hook for small robins, these worked out as 8cm squares,

stylecraft dk wool is used, using the colours, yellow, blue, red, and small amounts of white and black

stylecraft dk wool is used, using the colours, yellow, blue, red, and small amounts of white and black

Small amout of colour of you choice

American terms are used in this pattern