monarch butterfly basking on a european horse chestnut tree

leaf tree branch plant flower autumn nature shrub produce insect invertebrate animal yellow wildlife food blossom deciduous wildflower monarch butterfly basking european horse chestnut otago zealand butterflies ectotherms meaning rely external sources body heat conker autumnal colors fall animal autumn autumnal background beautiful brown butterfly calm closeup color complementary colours conker context detail environment chestnut fall colors garden green habitat insect leaf lepidoptera migration monarch natural nature zealand nz orange outdoor wintering plant plexippus real small spring summer sunny texture tree vibrant warm wild wildlife wings