Hello everyone and welcome to my blog! To those who have followed some of my previous blog attempts – welcome back! My name is Rick Simpson, and I am finishing my 3rd year of my Ph.D. at Arizona State University. Through this blog, I plan to share my thoughts, opinions, and stories on a variety of topics, such as life as a graduate student, my travels across Arizona and elsewhere, and my research experiences. I may also write about and discuss cool and interesting papers as they arise. Additionally, because I am interested in colorful and exaggerated visual traits in animals, I will be posting as many pictures and other visual media as possible throughout my posts. Some posts will be long, while others will be short. In some, I might rant about something that bothers me, but I will keep that to a minimum. Ultimately, I hope that this blog will be both entertaining and informative! Finally, please give me feedback as I go, so that I can continue to improve.
Well, I’m back from Peru and busily trying to wrap up my dissertation. While I will definitely write a final Peru blog post in the near future, I also recently wrote a guest blog post for Oxford University Press blog about my first dissertation chapter titled, “How do male hummingbird dance moves alter their appearance?” published in Behavioral Ecology. This chapter is titled “Two ways to display: male hummingbirds show different color-display tactics based on sun orientation,” and tests how broad-tailed hummingbirds orient towards the sun as they dance and how their sun orientation alters what they look like. I hope you enjoy the post and paper, and please let me know if you have any questions about the study!
Also check out this .gif they made for me from one of my YouTube videos.
While doing my fieldwork in Peru, I took a short trip to Cusco to visit Machu Picchu, and the other surrounding Inca ruins/temples, with my sister who visited me from Connecticut! For those who do not know, Machu Picchu is probably the largest tourist attraction in South America, and for good reason – it was spectacular. The Incas were one of the many native peoples that lived in Peru, and they formed a giant empire in the Andes Mountains between 1438 and 1572. The current city of Cusco, was at the heart of this empire, and a very important site for the Incas, spiritually and logistically.
The Incas also built many temples and complexes near Cusco, with the most famous being Machu Picchu, which was never discovered by the Spanish Conquistadors. While the Inca empire was vast and had achieved many technological innovations, especially with agriculture, architecture, and astronomy, the Spanish Conquistadors unfortunately brutally conquered the Incas and many of their discoveries have been lost. Luckily, modern science has been a great help in uncovering the secrets of Machu Picchu and other Inca sites.
During our travels around Cusco, we first visited a place called the Sacred Valley – it is the valley between Cusco and Machu Picchu. Along this valley are many interesting ruins, several churches that the Spanish built on top of Inca temples, and groups of people who still carry out many of the Inca traditions, and I was able to visit many of these places. We first visited the town of Chinchero where we saw one of the Spanish churches that was built on top of an Inca temple.
We were also able to watch how people weave alpaca fur together and use many different natural ingredients to dye woven materials into many different colors.
Then, we visited the town of Pisac and went to the Inca complex found there. At this complex, we learned how the Incas built their temples with specific designs that incorporated the movement of the sun and the moon. The Incas were brilliant astronomers and used their knowledge of the sun, moon, and stars to understand seasonal and weather patterns to help their agriculture. Here are a few pictures of the complex at Pisac:
After Pisac, we visited to the town of Ollantaytambo, at which is located the famous Temple of the Sun. This temple is particularly interesting because of the amazing architecture and engineering abilities of the Incas. If you look at these pictures, you can see how they managed to fit different giant stones together, without mortar, almost perfectly.
From Ollantaytambo we took a train to Aguas Calientes to spend the night, before heading up to Machu Picchu. Our visit to Machu Picchu was awe-inspiring. In the morning it was very cloudy and misty, giving it a mystical feeling, and by mid-day the sun came out, which gave us a great view of the entire complex. Here were learned about the significance of the complex and how it was laid out, with brilliant city planning and lots of terraces for agriculture to feed the people.
After our tour of Machu Picchu, we took the train back to Ollantaytambo, and then a car back to Cusco. The next day, we visited various ruins around Cusco, including the famous temple Saqsaywaman. We learned about the specific meanings of all the different ruins, and how the Incas used water channels and natural springs to spread water throughout the Cusco area, similar to how they did in Machu Picchu too.
Finally, we visited many of the museums in Cusco, which were very informative and a great follow up to our tours of the Inca ruins and Machu Picchu. Unfortunately, we were not allowed to take photographs in these museums, so I cannot show much from them.
We were fortunate enough to visit these places in the low season, so there were much fewer people, which I would recommend. The high season is between May and October (I believe) and there are huge, huge crowds during that time. Overall, I would highly recommend everyone to visit Cusco, the Sacred Valley, and Machu Picchu. It definitely lives up to the hype, and I thought exceeded it.
Finally, given that this post was mostly an overview of my visit, if you are interested in learning more about a specific place/ruin/topic please let me know!
That’s right, I am back in Peru right now studying hummingbirds. I know, it is a bit crazy for me to be gathering data the semester I plan to graduate, but I got a grant to travel to Peru, and I am not about to say no to that!
Anyways, this trip to Peru is much more structured than last time. Last time, I was scouting the country and searching for field sites. Now that I have field sites, I am staying those places for longer periods of time. Right now, I am in Northern Peru three weeks. I am currently staying at the Center for the Spectacled Bear Conservation Society (SBC), in a small town called Batangrande. It is a family run field station that is near the Andes Mountains and in the tropical dry forests unique to this region (called Tumbes). It is also a great location to study two species of hummingbirds: short-tailed woodstar (Myrmia micrura) and purple-collared woodstar (Myrtis fanny).
So far, things are going well. I have found territories of multiple males for both species, including over 10 territories for the short-tailed woodstar. Now I am working to trap a female of each species and use her to film the courtship dances of the males.
The short-tailed woodstar, which is a species somewhat endemic to the Tumbes region, is a tiny hummingbird with a ridiculously small tail (that is actually what it says in the bird guide book). The males have an iridescent purple gorget (throat patch) and sing a song similar to the Costa’s hummingbirds in the US. They live in the tropical dry forests here, which are a very interesting habitat. It is very hot and sunny here, but the habitat is different than many I have visited in Peru. Here are some pictures of the dry forests:
The purple-collared woodstar, is much more widespread in Peru, but tends to live at higher elevations. For them, we drive up into the Andes until about 6,500 ft (2,000 meters), and work in the montane scrub and agriculture areas there. I like these sites because they are much cooler than the dry forest below, and the mountains are very beautiful. This species has been a bit weird for me, because we have found many, many females, but only a few males. But the males we found will work just fine, and I have already seen them display naturally to females, which is a great sign! The purple-collared woodstar is especially interesting to me because of the color of its gorget. Most of the species in the group of hummingbirds I study (the bee hummingbirds) have purple, pink, or red gorgets, but the purple-collared woodstar has a greenish-blue iridescent gorget. I do not have any great pictures of the males yet, but here is the habitat in which we have found them, and a photo of the male from the side:
That is all I have for now, but I should have videos of courtship displays and photos of males that I have captured soon!
For this post, I am going to take a break from posting about my Peru travels to talk about hummingbirds and why they are so cool. My Ph.D. is focused on understanding hummingbird coloration and their courtship displays, but I am always asked why I chose to study hummingbirds over other animals. It certainly was not because they are an easy group to study. Quite the opposite – they can be very difficult to work with in some ways. Throughout this post, I am going to elaborate more on why I chose to study hummingbirds, but also in general, why hummingbirds are so interesting and fun to study. I am also going to include lots of pictures of different hummingbird species, as these are such photogenic animals!
Hummingbirds are only found in the New World (North, Central, and South America). There have been hummingbird-like fossils found in the Old World, and it is suggested that the ancestors of hummingbirds moved from the Old World to the New World through the Bering Straight. The ancestors then theoretically made their way down to South America and hummingbirds evolved from there. Hummingbirds are thought to have evolved about 22 million years ago, based on fossil and genetic data. Some of the oldest hummingbird species are pictures below.
There are roughly 340 species of hummingbirds currently, though new species are still being discovered. While we boast around 20-25 species in the United States, hummingbirds are most diverse in the Andes Mountains and Amazon Rainforest. The country with the most hummingbird species is Colombia, which boasts over 160 species!
Hummingbirds span a wide range of body sizes, with the smallest hummingbird (bee hummingbird) averaging around 2 grams (0.07 oz) and the largest hummingbird (giant hummingbird) averaging around 20 grams (0.7 oz). Many hummingbirds range between 3-7 grams overall (0.11-0.25 oz), and most of the species I study range between 2.5-4 grams (0.09-0.14 oz).
Hummingbird flight is also very unique relative to birds. They flap their wings in a figure eight pattern, and unlike many birds, they generate similar forces with their upstrokes compared to their downstrokes. Hummingbirds can also hover, a rare trait in birds, and I believe they are the only birds that can fly backwards. Their metabolism is also very fast. Their weight can change quite a bit over the course of a day as they eat and burn up energy. And hummingbirds hearts can beat over 1000 times per minute. This fast metabolism poses a problem at night, when hummingbirds have to go many hours without eating. Some hummingbirds will go into a hibernation-like state at night, called torpor, to conserve energy. They essentially shut off their bodies, and their heart rate can drop from 1000 beats/min to 100 beats/min. This is especially common in hummingbirds that live in colder places or at high elevations. Some hummingbird species like the Ecuadorian Hillstar can occur up to 17,000 feet (~5200 meters) above sea level!
One misconception about hummingbirds is that they only feed on nectar. While they have definitely evolved many specializations for nectar feeding, such as their hovering, long bills, and fast metabolism, they cannot survive on sugar water alone. Hummingbirds feed on insects, such as fruit flies, in order to obtain essential proteins, vitamins, and minerals. However, hummingbird bills can present interesting challenges to eating insects, such as for the sword-billed hummingbird (longest bill to body length of a bird) or the sickle-billed hummingbird (below). Also, hummingbirds interestingly have forked tongues.
Because many hummingbirds live in the tropics, most do not migrate. There are some high elevation hummingbirds that will migrate to lower elevations during the winter/dry season in the tropics. In North America, we have several species that migrate. Some rufous hummingbirds travel from Mexico all the way to Alaska and back every year. Some ruby-throated hummingbirds fly straight across the Gulf of Mexico, an incredible feat for a bird that cannot store too much fat for the long trip. Interestingly, some hummingbird migratory paths have been changing due to hummingbird feeders. Many rufous hummingbirds are now found migrating to the Southeastern US instead of Mexico. Other species have expanded their ranges due to humans. Anna’s hummingbirds have expanded their range into Canada and Arizona, when they originally occurred in California.
There are several reasons I decided to study hummingbirds. The first reason is their crazy colors. You can essentially find every color under the rainbow in hummingbirds, and some species actually do seemingly have every color themselves (like the fiery-throated hummingbird). Hummingbirds also possess a fascinating type of color called iridescence. This type of color looks different depending on the angles it is observed from and the angles it is illuminated from. Essentially, as the hummingbird moves around, the color of its plumage will change, as shown in this video (link). Because I am interested in how behaviors and colors interact and co-evolved, iridescent coloration provides a great system to study these interactions. Overall, the species I study, while very pretty, are actually quite boring relative to many other hummingbird species. Here are a few of my favorite species:
Another reason I study hummingbirds, is that many of them have elaborate dances males perform to females. This is especially true in the 10- species I study. And the interesting part is that the species I study all have similar variations of two types of displays: 1) the dive display ; 2) the shuttle display (link). The dive display is typically where a male flies high into the air, and then dives down over or near his target. The shuttle display is where a male flies rapidly back and forth in front of their target (usually a female), facing it and presenting their throat coloration. Because these displays are similar across species, I can really explore how evolution shaped each species’ specific display and why they are different from each other.
Hummingbirds are also very charismatic and fun animals to work with and observe. They are so bold and curious. They live such fast-paced lives and are always interacting – mostly fighting. And because they occur all over the place, I have gotten to travel all across Arizona, California, and now Peru. Hummingbird’s reliance on nectar can also make it easy to lure them to feeders, where I can observe and catch them. It is still quite difficult to catch a hummingbird sometimes, but feeders definitely help. Overall, hummingbirds are such unique and interesting animals, providing lots of opportunities to study many aspects of their biology. But hummingbirds also provide opportunities to ask broad questions about color and behavior evolution, which is the key reason I am studying them. I actually just submitted my first chapter to a journal, so when that ultimately gets accepted (fingers crossed!) I will blog about those results. For now, I hope this post taught you a few cool facts about hummingbirds and provided a better explanation for why I study them. If you are interested in learning more about hummingbirds, there are two hummingbird-focused PBS Nature documentaries I would recommend. The first is Magic in the Air and the second is one I helped with called Super Hummingbirds (available for free here).
The costal deserts of Central and Southern Peru, combined with the costal deserts of Northern Chile, are some of the driest places in the world. The Atacoma desert in Northern Chile is, to my knowledge, THE driest place in the world (excluding the poles). These deserts (including Lima, the Peruvian capital) typically get 0.2-0.6 inches (5-15 mm) of rain a year. In comparison, Phoenix gets around 8 inches (200 mm) a year, and Death Valley gets around 2.4 inches (60 mm) a year. This incredible lack of rain in these Peruvian deserts leads to some very, very barren areas. As I drove around the deserts of Central Peru, there was very little growing anywhere. It made the Sonoran deserts around Phoenix seem like a lush tropical rainforest in comparison.
But, despite this dryness, there is life to be found in these deserts if you know where to look. During certain times of year, water filled costal air blows onto land and gets carried upwards by the immediate slopes of the Andes Mountains. At low elevations (~300-1500 ft; 100-500m), this causes dense blankets of fog and mist to form and settle on the land. While it still does not rain, many plants and animals have adapted to secure water from this different source. This has led to the creation of mist oases – called “lomas” in Peru. I visited two of these places, and they were probably the most unique habitats I have visited in my life.
The first lomas I visited is a well known and popular national reserve called Lomas Lachay, which is north of Lima. As I was driving on the Pan-American highway, I was amazed by just how barren the desert was out there. Then I turned off the highway on this dirt road that started going up into the mountains. After a short while, the mist got thicker and the ground turned from sand to a sort of black bio-crust.
Then I hit the lomas, and was completely blown away. Suddenly in front of me was a lush green carpet of vines and bushy plants, shrouded in the densest mist I have ever seen.
I continued driving on the muddy road in the reserve to the beautiful songs of Peruvian meadowlarks, which are red unlike our yellow meadowlarks.
I then hiked around on these very muddy trails (from all the fog). Some of these trails quite steep, and I had some difficulty keeping my footing on the downhills. I spent several hours at this place, looking for hummingbirds, and while I was unable to find any, I was able to deeply enjoy this wonderful reserve and mist oasis.
After Lomas Lachay, I went to another lomas – whose name I am still not sure of but I think it is called Lomas Pachacamac. This was not an official reserve, and I actually had to drive around a wall that blocked the main road into it. This lomas did not have as many trees and the mist was a bit less dense than Lachay, but it was still very lush and green. I tried driving around the area a bit, but the roads were incredibly steep and narrow, so I just walked them. At this place, I found many burrowing owls, which were fun to watch.
Overall, these experiences in these mist oases were just astounding. I am very curious to visit them when I return to Peru in February, because the costal wet season will be over, and they will potentially be dried up. I am not sure what the wildlife does at that point, but I will try to figure out it next time I visit! I hope you enjoyed this post on these unique mist oases, and my next post will be about my wonderful trip to the Central Andes of Peru!
I am currently in the wonderful country Peru as part of a two-trip research venture to study Peruvian hummingbirds. I am expanding my current dissertation from the six species I have focused on in the US to closely related species in Peru. I will talk more about my specific research plans in a later post, but for this first post, I wanted to talk about the incredible diversity of habitats and environments that can be found in Peru.
Peru is a fairly large country, roughly twice the size of Texas or just a little smaller than Alaska. Here is an image from the CIA’s website to illustrate the size of Peru compared to the US.
For biodiversity, in the US and Canada, you can find around 900 species of birds, which is quite a large number. However in Peru, there are over 1800 species of birds, which is one of the highest numbers in the world. And that is just birds. There are over 500 species of mammals, 600 species of reptiles and amphibians, tens of thousands of insect species (including over 4000 butterfly species), and over 20000 species of plants. Those are incredible numbers, but how does Peru obtain such biodiversity? Through a combination of the Amazon Rainforest, Andes Mountains, and the Pacific Ocean.
Peru can broadly be broken down into three distinct regions: 1) the desert coast; 2) the sierra (Andes Mountains); 3) the Amazon. These regions vary from west to east, with the coast on the west and Amazon on the east. Peru can further be broken down from north to south. Northern Peru has some of the lowest mountains in the Andean chain and is close to the Equator, which leads to very different seasonality and the presence of tropical dry forests near the coast instead of just barren desert. Central and Southern Peru are somewhat similar, but the Andes are wider and higher (on average) in Southern Peru.
The Andes Mountains dictate much of the biodiversity in Peru, though the Amazon contributes a ton as well. Peru’s mountains have a very dry west slope, which is fairly close to the Pacific coast, and a very humid and wet east slope. In the middle, there are several large plateaus and valleys, that have their own unique properties, such as the Marañon, or temperate deciduous forests, in Northern Peru’s Andean valleys, and the high elevation, cold and dry Puna grasslands found in throughout the high Andes (over 3500 m or 11500 ft). As you move up in elevation on both slopes, but especially the east slope, the plant and animal compositions change drastically. This can be best witnessed on the east slope, as you start in specialized high elevation humid forests, such as Elfin forests, and then descend into typical cloud forests, which harbor amazing biodiversity, before dropping into the varied and vast lowland Amazon rainforest.
So far, I have mostly stuck to the coast and west slopes of Peru. I have spent most of my time in Lima, which is the capital of Peru, and in the Peruvian coastal desert. Peru’s coastal desert is one of the driest places in the world, but also is home to the spectacular mist oases, called Lomas.
I made two trips into the Andes from Lima, one sticking on the west slopes, and one going into the heart of the Central Andes, where I hit 4818 m (~15800 ft) and explored the Puna grasslands and a high elevation lake named Lago Junín. While I was in the Central Andes, I did take a day-trip to the east slope cloud forests, which allowed me to see a completely different side of Peru. I also took a five-day trip to Northern Peru, still sticking to the coast, but where I explored Peru’s tropical dry forests. Overall, I have only explored a small bit of Peru, but it has been am amazing visit full of many unique experiences for me! Over the next several posts, I will document these experiences, and then next Spring (for us) I will return to Peru to continue my work on hummingbirds!
Wow does time fly! This post is much delayed for two main reasons – lack of internet during fieldwork and a crazy busy travel schedule. In the past two months, I’ve been all over Arizona doing fieldwork and then I traveled to Pennsylvania, Connecticut, and South Carolina! Now I am in Peru. But more on all that later!
This post is a follow up on my earlier post on field work fails (Getting stuck in the mud without pants), but instead of a single story, I will present a series of photos documenting failures and mini stories explaining each one. I hope you enjoy!
#FieldWorkFail Number 1: Centipede in the sink
Whenever you are doing fieldwork, you should expect to have many different encounters with wildlife, whether you want to or not. However, this was something I was not expecting. After washing my dishes at a field station in the Mohave desert of Southern California, this roughly 8-inch long centipede crawled out of the garbage disposal. It scared the s**t out of me! I did not kill it though; I managed to scoop it up in a dust bin and throw it outside. It was only afterwards that I learned this was a Scolopendra, which can have very painful bites that sometimes result in hospital visits. Luckily I was not bit.
#FieldWorkFail Number 2: Hugging a teddy bear cholla
At the same field station, I had the unfortunate luck of running into a teddy bear cholla. In case you do not know what these are, here is a picture of some:
These cacti have a very misleading name. Even though they do want to give you a hug, do not let them because they will hurt and make you bleed. And typically the only way to get the huge ball of spikes out of you is with pliers.
#FieldWorkFail Number 3: The bird who pooped all over my car
When I was down in Southeast Arizona, I was fortunate enough to see many cool and rare birds. In this photo, you can see one of the interesting birds I saw – the hooded oriole. When I first saw it, I got very excited and took many pictures. Then I saw it attacking itself in my car’s rearview mirrors, and I thought it was amusing. However, the next day when I went to check on my car, I found poop all down the sides of my car where the bird had been attacking itself, which took forever to clean off. Lesson learned – when birds get mad, they poop everywhere and it is no longer amusing.
#FieldWorkFail Number 4: When I thought I lost a captive bird
Keeping animals in captivity when in the field can always be a bit nerve racking. What if they get attacked by something? What if they escape? What if they get too hot or too cold? etc. These are some of the many questions that go through my mind when I have hummingbirds in captivity, despite having great success at doing so with many species. But when I saw this roadrunner with something dead in its beak run from the barn I had my captive hummingbirds housed in, I panicked. I raced to the barn only to find all my cages intact and my birds safe. I then zoomed in on the photo and realized it was a dead mouse in the roadrunner’s beak. Heart attack avoided!
Note – when I keep hummingbirds in captivity, they are inside individual cloth mesh cages that are hung inside a large screen tent for double protection. I also check on them regularly and keep them in safe places, such as a barn. And all of my captive work is approved by the US Fish and Wildlife Services, Arizona Game and Fish, Arizona Institutional Animal Care and Use Committee, and the field stations at which I work.
#FieldWorkFail Number 5: That time a male acted very odd
When I first started working with hummingbirds, I tried many different things to get them to do their courtship displays. Some species have been known to court hummingbird mounts, and so I attempted to present a mounted hummingbird to a broad-tailed hummingbird male. I expected the male to either display to the mount or attack it, which are two very normal hummingbird behaviors both of which I have observed. Instead, this male flew up to my mount, and used its bill as a perch. And it just sat there, staring at me. This was entirely unexpected and very strange. After this incident, I decided to scrap that method and have never used it again, but at least I got some interesting photos from the situation.
#FieldWorkFail Number 6: I hate the wind
When I am doing fieldwork, my number one mortal enemy is the wind, even above ants! And that is because of moments like the one captured in this photo. Here I was simply trying to trap a male hummingbird using a caged female and feeder as a lure, when it suddenly got really windy, blowing my cage around, and making the nets flap like crazy. All of this movement scared the male away, and I never caught him. I ended up having to stop work early that day too because it was just so windy. So yah, I hate the wind.
And those are some of my #FieldWorkFail captured on camera. I hope you enjoyed it, and I will blog again soon with travel updates and maybe some cool pictures from Peru!