Monarch Watch on Instagram: "Take a moment to listen to some butterflies. Estela Romero shared this incredible moment of monarch butterflies flying at El Rosario Sanctuary in central Mexico last week. Official overwintering numbers are not available yet, but we’ll continue to share updates as we receive them. Thank you to Estela for sharing this with us! . Estela Romero is an environmental educator with Monarchs Across Georgia. Reporting from Angangueo, Michoacán, Estela Romero's work is made po