The weirdness of the shoebill goes far, far beyond its
taxonomy and evolution. Visually, they resemble something resurrected from the
depths of prehistory. Despite its prominent bill and captivatingly unique
appearance, the shoebill is a reserved animal; in fact, while many may find
them ugly or comical, I think they have a certain stoic beauty about them. They
are truly the wise, old fishermen of the bird world; standing motionless for
hours on end, waiting for fish to come to the surface.
A shoebill in its preferred fishing spot: perched on floating vegetation. Photograph by Jnissa, from Flickr. |
Most piscivorous (that is, fish-eating) birds display
certain adaptations for hunting their prey, whether it be a lance-like bill, sharply-hooked
talons, spacious pouches, or paddles. But the shoebill is, not surprisingly, an
anomaly: its bill is stout and broad, rather than slender to pierce through
water; their toes are unwebbed and they neither dive nor swim.
Shoebills fill a very specific niche: they prefer to hang
out around poorly-oxygenated waters, areas in which fish such as catfish and
lungfish often need to rise to the surface to gulp down air. They are not so
much unequipped for fishing as they are extremely well-equipped for angling in
different waters.
A shoebill ruins some poor fish's day. Photograph by Morgan Trimble. |
Their fishing tactic is less like that of a
spear-fisherman, and more like a catfish noodler: they don’t simply pluck fish
from the water, they go all in. They simply wait for a fish to take a breath
and then launch into the water in a flurry of splashing feathers, killing them with
a nail-like projection on the end of the bill. The “hunt” usually consists of
loss of balance and, in some cases, entanglement with foliage. Some individuals
have had to free themselves from vegetation before they can even swallow their
meal. The shoebill’s broad and powerful beak allows them to tackle a wide range
of prey, ranging from snakes, turtles, and young crocodiles to rodents, young
waterfowl, and, apparently, an antelope calf.
Did you catch that last one? I’ll say it again: it ate a baby antelope.
The business end of a shoebill. The nail-like projection on the tip of the bill can be seen clearly in this photo. Photograph by Makitani, from Flickr. |
Yes, it’s true. There exists just one account of a
shoebill feeding on a newborn black lechwe, a subspecies of wetland-dwelling
antelope found throughout central and east Africa. I’m a little unsure what to
make of this observation: the shoebill is certainly well-equipped to kill such
prey, but it would be impossible for the bird to swallow, and it lacks the
proper equipment with which to tear its prey apart. Perhaps the shoebill in
question was observed feeding on a calf that had already died. No matter what
the observation actually was, this is the only account of a shoebill feeding on
prey of that size, and it was made in 1961. It is not typical shoebill behavior
to chase around antelope. Lungfish are easy enough to catch.
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