IMG_0590[1]

IMG_0590[1]

Observation - IMG_0590[1] - UK and Ireland. Description: is this a species of moth? wondered if this is 2 moths mating? They measured about 2 inches across and were on my garden gate post all day, the top one disappeared a couple of hours before the bottom one (the black post should be vertical not horizontal,

is this a species of moth? wondered if this is 2 moths mating? They measured about 2 inches across and were on my garden gate post all day, the top one disappeared a couple of hours before the bottom one (the black post should be vertical not horizontal, not sure why that has happened