A troubled year

After arriving early, Morven’s mate from last year did not arrive until 2 weeks later, by which time she had paired up with a new 6-year-old male. When yellow HA returned there was obviously a very big fight on 15th April which resulted in him being chased away and probably injured by the new male.  Morven and her new mate then left this nest and went off elsewhere – I now think I know where but still need to be certain. Her nest was then taken over during the melee by a new young pair which are using it on and off, but are not going to breed this year.