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.
Many species of butterflies live in disturbed areas adjacent to rainforest but are not included in the species tally because they are not true denizens of the rainforest. Regardless of such qualifications, it is clear that rainforest butterfly diversity is much higher than in temperate forests.