The agave nectar plant has impressive stature; it's about 7 to 12 feet in diameter with leaves up to 8 feet tall. (supernaturalacnetreatment.com)
Common threats include: loss of nesting and roosting sites, habitat fragmentation by conversion or destruction of vegetation, habitat fragmentation by excessive exposure of nectar plants to herbicides and pollinators to pesticides, over-hunting, disruption of nectar corridors required by migratory pollinators, and competition by invasive species65. (fao.org)
All three live only in Costa Rica and western Panama and they were found to be locally specialized to feed on particular nectar plants. (sciencedaily.com)