Birds dropped out of the sky, dead fish covered miles of the surface of rivers and bays, the media started digging up any reference to mass animal deaths they could find, and the public voiced a growing concern about what it all meant.

These kinds of die-offs are unusual but not unheard of in the nature, and so the good news is that while alarming, they don’t mean the world is ending and probably won’t have too much impact on the overall survival of the species that have experienced them.

While most wildlife experts see little cause for significant concern with these events, there are some mass wildlife deaths that we really should be worrying about.

5. Colony Collapse Disorder

Colony Collapse Disorder (CCD) causes honey bees to mysteriously abandon their hives and die. First reported in the United States in 2006, scientists are still trying to figure out the exact causes. While not native to North America, honey bees are critically important for the pollination of over 100 crops that both people and our livestock rely on for food. Eighty percent of all crop pollination service in the U.S. is provided by honey bees, which means that one-third of all the food we eat is directly the result of these insects. Honey bees also play an important role pollinating wild plants that wildlife depend on for survival. This mass die-off of honey bees could have significant economic and ecological repercussions.

Theories for the cause of CCD include infestation by exotic mites, viruses, a fungus, pesticides or other chemical pollutants, global warming, stress on hives from industrial beekeeping practices, or a combination of these factors that is suddenly pushing millions of honey bee hives over their tipping point and ultimately to death. While native pollinators can help fill in the gap caused by honey bee CCD, unexplained mass die-offs in several native bumble bee species are now also being reported.

4. White-Nosed Syndrome

North American bats are dropping like flies as a result of this mysterious ailment, which is characterized by the growth of a white fungus on the face of bats that hibernate in colonies in caves during the winter. The bats repeatedly wake up from their hibernation and fly about despite the cold temperatures and lack of insect food. In doing so, the bats burn off critical calories and ultimately die. Some bat hibernation caves have experienced mortality rates as high as 99 percent and since 2006 millions of bats have succumbed.

Scientists don’t know if the fungus is the cause of the odd behavior and killing bats directly, or if it is simply a secondary symptom of some other problem. One thing is certain, White-Nosed Syndrome has spread rapidly across the country, adding additional threat to endangered species such as the Indiana bat and drastically reducing once-common species like the little brown bat. Scientists are still searching for a clue as to the cause of these devastating mass bat deaths.

3. Global Amphibian Decline

Amphibians are often considered to be ecological “canaries in the coal mine” because their sensitive skin allows for the exchange of gas and liquids, making them particularly vulnerable to pollution and other disturbances to their habitat. As a result, amphibians are often the first group of animals to die out in disturbed or polluted environments. Dying out is exactly what amphibians are doing all around the world, and scientists don’t know why.

As with Colony Collapse Disorder, any number of causes could be at work either by themselves or in concert, including air and water pollution, global warming, habitat destruction, invasive species and most notably the type of chytrid fungus known as Batrachochytrium dendrobatidis or “Bd” for short. This fungus was discovered in 1999 and has been rapidly spreading and killing mass numbers of amphibians on several continents, including both North and South America, Europe and Australia. As with White-Nose Syndrome in bats, it’s not known whether this chytrid fungus is a new, random pathogen or if it has always been present and is only now spreading because of other, as-yet-unknown reasons. The statistics are frightening: thirty percent of amphibian species on the planet are listed as either threatened or endangered and another six percent are listed as near threatened. Scientists don’t know the status of another twenty-five percent.

2. Gulf Oil Disaster

The official wildlife body count of the Gulf Oil Disaster is 5,686 dead birds, 546 dead sea turtles, and 96 dead dolphins and whales. And that’s just the animals that rescue workers were able to recover in the vast area of the Gulf of Mexico affected by the millions of gallons of oil that gushed into the Gulf’s waters and coastal wetlands when BP’s Deepwater Horizon rig exploded. It’s doubtless that the wildlife death toll is more likely in the millions when you factor in open ocean species such as sperm whales or whale sharks that sink when dead or that might not immediately die but eventually succumb to slow poisoning as they eat contaminated food, as well as the fish and marine invertebrates that have also died but for which no one has a count. Even worse, judging from previous oil disasters such as the Exxon Valdez in Alaska, we can expect wildlife will continue to die for months, years or even decades as a result of this disaster.

1. Global Warming

The scale of the impact that global warming is predicted to have on wildlife across the planet can’t be understated.

We are already experiencing the rapid melting of glaciers, more severe storms, an increase in droughts, wildfires and flooding events, the spread of invasive species, and the record decline in Arctic sea ice making the long-term survival of species such as ringed seals and polar bears uncertain.

Countless other wildlife species around the globe will be negatively affected as global warming destabilizes ecosystems unless we act quickly to change the root causes.

Dr. Sylvia Earle interviewed by NWF's Bob Serata at John Pennekamp Coral Reef State Prk, Key Largo, Fla. Photo: Belinda Serata/NWF

Movie and TV stars don’t do it for us. But when my wife Belinda and I met Dr. Sylvia Earle as she came ashore from a dive boat, walking the narrow deck in her wet suit, still dripping, still smiling, we both felt the power of one person’s life’s work. I think we were a bit star-struck.

Sylvia Earl, NWF Conservation Achievement Award Honoree, has been an Explorer-in-Residence at the National Geographic Society since 1998, the year Time magazine named her the first “hero for the planet.” She has spent most of her professional life under water, leading more than 70 expeditions. She was nicknamed “Her Deepness” after setting the solo diving depth record of 3,300 feet. She calls the oceans the “blue heart” of all humans.

As the first female chief scientist of the National Oceanic and Atmospheric Administration (NOAA), Sylvia was a central figure in establishing the Northwestern Hawaiian Islands Marine National Monument (aka Papahānaumokuākea), the largest single fully protected area in the United States and the world’s largest fully protected marine area — 140,000 square miles of protected ocean (larger than all of the nation’s national parks combined) that is home to more than 7,000 kinds of marine life. The monument was created by President George W. Bush via presidential proclamation in 2006.

Sylvia came up to us, hand outstretched in greeting, a 75-year-old version of the pioneering marine botanist who broke with tradition by studying marine plants in the plants’ environment, instead of breaking off pieces and carrying them back to the lab.

In town to give the keynote speech at the 50th anniversary celebration of John Pennekamp Coral Reef State Park in Key Largo, Fla., Sylvia took some time to talk to NWF about conservation, caring and science.

Bob Serata snorkels above a young whale shark (about 12 feet long). Photo: Belinda Serata/NWF

NWF / BS [interviewer’s initials, by the way]: You were in the Gulf of Mexico in June 2010 studying whale sharks. Tell us about that.

Dr. Earle: The expedition in June 2010 was in part a response to the oil spill. What scientists were really concerned about was what the oil spill might be doing to the whale sharks because among other things they eat right at the surface. They open their big mouths and whatever’s there comes in.

We’d spent a day looking at patches of sargassum and hoping to see whale sharks but we didn’t sign of a whale shark. We did see some big mats of floating sargassum. We stopped at an oil rig and swam with some of the great collections of fish that tend to gather around the rigs.

We went to sleep that night 70 or 100 miles offshore and when we woke up in the morning, the crew of the ship we were on was yelling, “You gotta get up, whale sharks, whale sharks.” So we all tumbled out of our bunks and we were surrounded by whale sharks. An airplane that Dr. Eric Hoffmayer had engaged counted 91 whale sharks in just one frame.

We went in the water and there weren’t just whale sharks up at the surface, there were layers of whale sharks.

NWF / BS: How could the Gulf oil disaster affect whale sharks?

Dr. Earle: In a single gulp, a whale shark might get a cross section of 12 to 15 different animals. From polychaete worms to jellyfish, arrow worms, flat worms, copepods, anthropods, larvae of shrimp and crabs. And whale sharks feed at the surface where there was a lot of oil.

NWF / BS: It’s also thought that a lot of sargassum was destroyed by the oil and dispersants. Why should we care about seaweed?

Dr. Earle: Sargassum is like a rain forest. It’s a little wetter than a rain forest. But it’s a golden floating forest. It floats in the ocean, it’s like a floating island of life out there; it doesn’t stay anchored.

When you see a big mat of sargassum instead of saying “oh yuk,” say “oh fantastic,” because if you get a mass and look closely at it, you’ll see little eyes looking back. Or if you gently scoop a little bit and put it in a bucket of water or a dish pan and you just watch you’ll see little filefish, you’ll see baby sargassum fish, baby flying fish all the color of the sargassum, and little snails because that’s their only home.

Baby turtles find a home there. And with the loss of sargassum it’s a loss of habitat, it’s bad news for the baby fish that seek haven there, for young turtles for a whole suite of organisms that absolutely require this as a nursery a safe haven in the open sea.

Green Sea Turtle. Photo Credit: Philippe Guillaume

NWF / BS: The ocean seems such a huge concept, what can an individual do to help conserve it as a resource?

Dr. Earle: The best answer about solutions is exactly what you’re [NWF is] doing. You’re communicating what the issues are, encouraging people to think and to understand why it matters to us, why taking care of the ocean relates to our everyday lives. With every breath we take, every drop of water we drink we’re connected to the ocean, not everybody knows that.

Everyone can consume fewer wild animals from the sea. We’re taking far too much ocean wildlife and it has an impact. It’s hard to find a shark or to find a big grouper, so let’s just stop killing them. Or if you do, make sure that you treat it with great respect and don’t do it every day or every week or every month, just make it a special treat. A special treat for me today is seeing one alive out there. I only saw one grouper in a dive of about an hour out at Pennekamp Coral Reef State Park. There should be dozens of them everywhere.

Everyone can lend their support to ocean protection. Part of it means supporting those efforts to have places like Pennekamp Park or to really expand the fully protected areas as safe havens for fish.

If you really want fish to eat in the future you’ve got to save them now. Only about 10 percent of the large species we like to consume – tunas, swordfish, marlin, sharks, grouper, snapper – are still there from where they were 50 years ago.

A fraction, less than one percent, of the ocean is protected and all the rest is open for fishing and not just casual fishing, I mean large-scale fishing that is taking the heart out of the ocean. We just need to think differently. We don’t go out and make a meal out of songbirds, we don’t find them in our supermarkets. We think nothing of seeing wild fish, wild shrimp, wild lobster, wildlife from the sea in large quantities pouring into us and out of the ocean. It doesn’t mean we should stop eating wildlife from the sea, we’ve just overdone it, it’s not sustainable.

The message is the same wherever a person lives – you’re dependent on the ocean. The ocean generates 70 percent of the oxygen in the atmosphere; 97 percent of earth’s water is out there in the ocean. Yes, it’s salt water and we don’t drink salt water but where does rain come from? It comes from water that goes up in the atmosphere forming clouds and sending fresh water back to the land, restoring rivers, lakes and streams. Without the ocean, earth would be a lot like Mars.

We are all sea creatures in a way. We’re all dependent on the ocean, even if you’ve never seen the ocean or thought about the ocean, the ocean keeps you alive and the ocean needs your help at this point in history. It needs your vote. Fish don’t vote.  It needs you.

If you’re a kid if you’re grownup it doesn’t matter. You have power and part of it comes of making your voice heard. When I served as the chief scientist at NOAA, the letters that people would send really counted and it counts now on the local level and the state level and the national level, and even international. Write to the United Nations if you have an issue about the atmosphere or the high seas or about policies that affect the whole world, whatever it is. Your voice counts. It counts when you’re silent every bit as much. Lack of expressing yourself suggests that you don’t care. So inaction is a vote. Inaction is a decision just like action is a conscious decision.

I think the biggest problem today is complacency. People who just don’t do what they could do to make a difference when we really need as much help as we can get to give voice to the voiceless — all those in the future who aren’t here to express themselves or vote, and all of the wild creature who can’t vote and can’t express themselves.

Ben Raines at AL.com reports:

“But for the last two weeks, the Alabama coast has been one of the best places in the world to see the ocean’s largest fish, with dozens of sightings reported to a whale shark Web site by fishermen, scuba divers and pilots. The gigantic plankton-eating sharks have been seen as far east as Panama City and as far west as Petit Bois Island off Mississippi. But the bulk of the reports have come from the area between Orange Beach and Pensacola, with one sighting just two miles off the beach.”  

See full article: Includes video: of biologist discussing sightings.