Eclipse will see skies darken across the UK at around 9.30am tomorrow . ZSL London said it may affect the light of nocturnal moths and butterflies . Expert claims dogs and cats may be 'sightly disturbed ' by unusual lighting . Observations of previous eclipses hint that nocturnal animals such as owls may become more active , while around 9.30am creatures may go to sleep . Studies are split as to whether birds will sing or be silenced by the event .
Eclipse will see skies darken across the UK at around 9.30am tomorrow . ZSL London said it may affect the light of nocturnal moths and butterflies . Expert claims dogs and cats may be 'sightly disturbed ' by unusual lighting . Observations of previous eclipses hint that nocturnal animals such as owls may become more active , while daytime creatures may go to sleep . Studies are split as to whether birds will sing or be silenced by the event .