Description:

Due to their unique evolutionary traits and physiology, pegasus mares can sometimes exhibit brooding behavior. This includes irresistible impulse to nest-building, and they will use any material they find for this purpose.

They will snap out of it within a few days (and feel very silly). It's best not to interfere, unless they are causing property damage.
safe2574850 artist:glutenfree_texmex86 derpibooru exclusive47098 imported from derpibooru3777624 fluttershy310942 pegasus573997 pony1749567 behaving like a bird866 belly button131242 brooding33 chest fluff78827 clothes770454 ear fluff60848 feather9941 female2065530 fluttershy's cottage2516 head turned106 indoors16501 leaves4187 looking at something6176 looking down18080 mare844953 moss258 mouth hold27318 nest774 nesting instinct38 newspaper2314 one wing out1063 panties79429 raised hoof81553 sitting112213 solo1664083 spread wings114581 stick1053 toilet paper roll252 turned head2437 twig184 underwear98077 window17905 wings285055 yarn664 yarn ball469

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