Two swallows perch on a metal structure at San Pablo Bay National Wildlife Refuge, merging nature with the industrial. Full Description: Captured on a spring afternoon at San Pablo Bay National Wildlife Refuge in Vallejo, California, this photograph features two swallows resting atop a metal surface. The contrast of their natural beauty against the cold metal highlights the intersection of wilderness and industrial life. The date was April 26, 2025, and the moment was immortalized using a Canon R7 camera, showcasing the swallows' delicate features along with the bolt that secures their impromptu perch.