2cy May. Tails may be rather difficult to assess (esp. separation of pre-breeding and post-breeding/post-juvenile generations, which all can be rather variable in wear). However, separating the mentioned generations is not necessary - it is only the presence of juvenile feathers that help the ageing process (proves the bird as 2cy). In this bird, R3-4 (both sides) and left R5 are juvenile, while the rest, R1-2 (both sides), right R5 and both R6, are either post-juvenile or pre-breeding. [1ES24630]