Observation is for cause of beak deformation. More information on Alaska picornaviruses and occurrence in chickadees is available at the links in this observation: https://www.inaturalist.org/observations/164200324
Misc note: this bird allowed me to get extraordinarily close. The photos are uncropped using my phone.
An adult perched near a chick on the nest.
Guarding an egg
2 individuals soaring together ❤️