Here's a whitespotted bamboo shark:

A porcupinefish, no species in particular but the markings were modeled after a Diodon holocanthus:

A male American Kestrel:
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A Harris's Hawk; I feel like the head's too big:

And while not strictly black and white, it is fairly monochromatic. Here's an octopus done in Adobe Illustrator in the style of Live Trace for a volunteer name tags board:

Working on a Crested Caracara pen and ink drawing now. Otherwise, mostly working on new signage.