Flue slope. Question-I've seen this type of venting 3-4 times a month in older houses and never had anyone complain. The bottom metal flue is the 80% furnace with an uphill rise from it to the newly lined masonry chimney (stainless steel liner).
Monarch butterflies utilize different habitat in the warm months versus the cold months. In the spring, summer and early fall, they can be found wherever there are milkweeds. Monarchs lay their eggs on milkweeds and they're always searching for them in fields, meadows and parks.
Where species are plentiful. Butterflies and moths abound in most habitats. The particular mix of species depends on the season, time of day, and other plants and animals at the site. Any given locality may have 400 to 750 species. Some fly at night and some fly during the day. Different species emerge as adults at different times of the year.