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A Brown-headed cowbird a small, obligate brood parasitic icterid native to temperate and subtropical

A Brown-headed Cowbird Molothrus ater an Obligate Brood Parasitic Icterid Perched in a Tree in Colorado

Loranthus obligate parasitic plant that lives and grows on tree trunks of other plants.

Mustard plant's unhealthy leaves Puccinia is a genus are obligate plant pathogens and are known as rusts

Mustard plant's unhealthy leaves Puccinia is a genus are obligate plant pathogens and are known as rusts.

Orange love vine cassytha filiformis. growing over a malaleuca tree.

pictures of young leaves to old leaves and dry leaves