This morning I watched aghast as Mr. Rufous hit the window and fell to the ground. Rushing out to give him sugar water, I was so relieved to see him recover his wits and fly towards his cottonwood bower on his own. A very close call. Rufous, an iridescent coppery jewel arrived here on June 22 and his mate – just as beautiful in her less dramatic emerald and rust attire, came with him. My other resident hummingbirds (black chin, and broadtail) all seemed to be cooperating as they visited my two feeders. I wondered how Rufous and his wife would fit in so I have been keeping a sharp eye on hummingbird cooperation dynamics. Five weeks have gone by since their arrival, and this couple is staying to raise a family. It is true that this pugnacious little hummingbird can throw a wrench into cooperation but I have been pleasantly surprised to see this male and female sipping nectar with other birds sitting on neighboring perches. Could it be that the broadtail and black chin social dynamic has rubbed off on Mr. and Mrs. Rufous? I have no way of knowing but it does seem that they are more willing to compromise than most others I have known. Some days, of course, Mr. Rufous hovers above the feeders and making sudden aggressive dives scaring the others away with his high pitched squeaks and buzzing - but only for a few moments. Usually he lets the others return to share quite companionably. Mrs. Rufous seems very cooperative and she has taken to visiting the nastursiums, scarlet runner beans, fiery salvia, deep rose and scarlet penstemon and the pot that holds my bee, butterfly, and hummingbird friendly wildflower mixture that Iren gave me last spring. Apparently, the territories that the male and female rufous hummingbirds “defend” are somewhat different. Males hover over the primary food source(s) while the females extend their ranges further afield choosing less dense wildflower meadows. But this year, except for my little pot garden there are few wildflowers beyond the fence where I do not water, so choices, at least here, are limited. And Mrs. Rufous does not hog these flowers. Rufous hummingbirds are small with a short tail with mighty flight skills that allow them to travel 2000 miles from Mexico to as far north as Alaska for breeding in the western states. This migration can take place from as early as May to August in New Mexico, and some stop along the way to raise their families. They follow the wildflower season throughout the rocky mountain area. During their long migrations, they make a clockwise circuit of western North America each year moving up the Pacific Coast in late winter and spring, reaching Washington and British Columbia by May. As early as July they may start south again, traveling down the chain of the Rocky Mountains. The adult male has a slender bill, white breast, a rusty face, flanks and tail with a startlingly beautiful orange-red throat patch or gorget. Some males have some green on back and/or crown. The female has green, white, some iridescent orange and a dark tail with white tips. The female is slightly larger than the male and has longer wings. As many of us know they feed on nectar from flowers using a long extendable tongue or capture insects on the wing. These birds require frequent feeding while active during the day and go into a state of torpor at night to conserve energy. Because of their small size, they are vulnerable to insect-eating birds and animals. Most breeding habitats are open areas, mountainsides and forest edges in western North America and the Pacific Northwest. The female builds a nest in a tree or shrub and raises her brood of two chicks alone. The offspring are ready for flight in about three weeks. Surveys show continuing declines in rufous numbers during recent decades. Because they rely on finding the right conditions in so many different habitats at just the right seasons during the year, this hummingbird is especially vulnerable to the effects of climate change. These iridescent "flower birds," were considered gifts from the gods by Indigenous peoples. In Peru and other South American countries, naturalists have cataloged over three hundred species, and it is believed that not all have been discovered yet. The rain forests of South America were probably where hummingbirds first evolved (co-evolved) with flowers. I like to imagine that hummingbirds once sipped the life-giving nectar, leaving behind a pollinated forest before flying away, their burnished colors shimmering in a primal world of sunlight…
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The other day my friend Sabra regaled me with spadefoot toad stories that caught my hair on fire. Toads and frogs need water to thrive and the lack of rain has left me feeling paralyzed and obsessed at the same time over a thirst driven desert, and missing my liminal amphibious friends dearly. Listening to her talking about the toad holes in her garden - Sabra literally waters these round depressions every night until resident toads pop their heads out of the hole with their tongues sticking out! One year someone had made a sort of trench in the arroyo below Sabra’s house and it filled with water. One night they heard such a racket, that she thought a truck was stuck, and ran down the canyon and discovered that the toads were singing! These stories of hers made me realize that I feel exactly like a toad myself. I am starved for water from the sky. Every morning before I walk down to the river at dawn I turn on the sprinkler in front of the house to water the chamisa to keep one area green, but also to create a bathing area for the hummingbirds and other birds who take early morning baths under the spray. Everyone needs water…and I keep hoping that a toad or two might find this temporary early morning oasis at some point and move in. So far, no toads…my guess is that I would need a more permanent source of water, not to mention less heat (because most toads cannot survive temperatures above 86 degrees) to have some visit. Last year I heard one western toad and found one dead on the road, run over by a car. She was probably on her way to meet her croaking male suitor. No toad eggs appeared in Iren’s little pond, so my guess is that this female was the only other toad in the area. After Sabra told me about the spadefoots I immediately looked them up wondering if they also live down here by the river. Listening to the spadefoot’s call so I could recognize it, I was surprised at how different the calls of spadefoot sounded from the others – a weird grating sound. I also learned that the spadefoot is found in all of New Mexico’s 33 counties but I was not able to determine precisely where they prefer to live (Sabra lives on the Mesa). Some sources say they burrow near ponds and low areas but obviously they also like Mesas if they have a water source like Sabra does. When I learned that they were nocturnal, secretive, and totally dependent upon rain I realized I might have one in my area and not know it? I needed to learn that call. Distinguished by eyes with vertical pupils (other toads have horizontal pupils) that sit close to the top of their heads and small, hard, wedge-shaped structures on hind legs used for digging into moist soil, spadefoot toads vary in color (between gray, brown or dusky green). They are approximately 1.5 to 3.5 inches in length and when threatened they emit an odor said to smell like roasted peanuts. These toads can survive temperatures above 98 degrees, unlike most other toads. The amazing thing about spadefoots is that they spend most of the year underground in cocoons formed from layers of shed skin. This shedding of skins helps keep the toad from 'drying out' or dehydrating, and they stay alive in a state of ‘suspended animation’ called estivation. Some burrow three feet down in the ground. When summer rains fill low areas with water they emerge to feed for the year on insects (termites, ants, beetles and spiders but not worms as Sabra feared) and to breed. The males do the calling. Breeding takes place in temporary pools. Around a thousand eggs are laid in large masses and often hatch in as little as 48 hours. The tadpoles are forced to metamorphose in 7 – 13 days, the fastest developing of all toads. If the tadpoles hatch, little toadlets will eat frantically (they are omnivorous too) and burrow into the ground to wait for the next downpour. With this drought I can’t imagine water remaining above ground long enough for tadpoles to survive, even if we do have rainfall. The earth is so parched. It does not surprise me that most of the seven species of spadefoots are under threat of extinction, especially with global warming. Most sources say they are not ‘true toads’ because they do not have warty skin and they have teeth! Talk about living on the edge – wow – the fact that these amphibians have survived at all is a source of mind-bending amazement to me. Sara Wright Every morning when I go out to water my potted plants and the remnants of the chamisa bushes that were sacrificed during the process of building I meet the lizards. I have two kinds - sagebrush lizards and the desert grassland whiptails. Both of these reptiles appear to enjoy my company as much as I enjoy theirs, or perhaps they are just waiting for the water to start flowing. This morning when I planted a few coyote gourd seeds in a hole that I had recently dug a whiptail lizard emerged like magic from somewhere under the house delicately positioning himself at the edge of the water logged hole for a drink. In the early morning light his stripes shimmered in the sun. The annoying thing is that I never have a camera with me to capture these morning antics, but I look forward with anticipation to seeing these lizards scurrying about every day. Desert grassland whiptails are very long and slim, with a thin tail that is longer than their body length. The most distinct identifying feature of these lizards are the six yellow lines – some very bright - that run the length of their bodies. The rest of the whiptails bodies, around here at least, tend to be olive or brown. Their tails are faded blue or gray. Curiously, an adolescent's tail is a very bright and vibrant blue so I am always on the look out for the young ones. Whiptail bodies are lined with small coarse scales, which gradually get larger towards their tails. The scales on their bellies are larger and smoother. Desert grassland whiptails are found in the deserts of southern to central Arizona and along the Rio Grande River in New Mexico. They are also found in the deserts of northern Mexico. A. uniparens is commonly found in low valleys, grasslands, and slight slopes. Some have argued that the species' range is expanding due to overgrazing. They are scarce in developed areas, especially where homeowners keep livestock. One amazing fact is that all desert grassland whiptail lizards are female! Strangely, researchers note that a kind of pseudo-copulation occurs which promotes fertilization during ovulation. The lizards reproduce by parthenogenesis, but offspring do not necessarily have the same chromosomes as their mother. This is because the lizards start off with twice the amount of chromosomes as would be found in sexually reproducing individuals. Diversity is maintained by combining sister chromatids which have the same origin but different functions. Whiptails eat spiders, termites, ants of all kinds, beetles, and short-horned grasshoppers. These food habits make them very appealing to gardeners like me who don’t use any toxic chemicals to prevent insect infestations. Whiptails are constantly in motion! They often run upright on their hind legs, giving them the appearance of miniature dinosaurs! They also swivel their heads frequently from side to side, taste the air with slender forked tongues, and use their pointed snouts to probe the ground as they forage. Their speed, and agility help them outmaneuver predators such as thrashers, roadrunners and snakes. One of my Chihuahuas, Lucy, is fascinated by them and always tries to chase them into the cottonwood leaves! Did you know that these lizards can sprint up to fifteen miles per hour (as fast as a roadrunner)? Whiptail lizards can also escape capture by sacrificing their tails (when grasped, their tail breaks easily along a fracture plane in the vertebrae). The disembodied tail wriggles violently, which startles and distracts the predator while the lizard dashes to safety. Whiptails are wily creatures, beautiful to look at, and fun to watch. They do seem to enjoy scurrying around my feet as I water. I always talk to them, and when I do they watch me and listen with apparent curiosity. In my opinion, paying close attention to these little characters will bring joy into your day! Night Song Sara Wright For the last three nights I have been awakened by a bird singing at around 3AM. The first and second nights I heard three short cheeps and a strange buzzing call. These calls were repeated a number of times. Last night the bird that heard made three soft calls a number of times. No buzzing. Mystified by the night song occurring just outside my window I finally did a bit of research on the sounds of birds made by the nightjar family because although these calls were different, I am familiar with the species in general – especially the whippoorwill. After listening to bird recordings I was sure the buzzing sound was part of the mating dance of the male whose wings made the sound. The common nighthawk (Chordeiles minor) is a medium-sized crepuscular/nocturnal bird, part of the nightjar family. Typically dark grey, black and brown, these birds display cryptic coloration and are intricately patterned. This bird is almost impossible to spot during the day. On a moonlit night the nightjars that I have seen fly erratically. The most remarkable feature of this insectivore is its small beak that seems a bit at odds with its full rounded and somewhat squat body. The common nighthawk does not travel frequently on the ground, instead preferring to perch horizontally, parallel to branches, on posts, on the ground or on a roof. It has very short legs! There is apparently some variability in territorial size. I have never seen more than one pair in an area at once. The most conspicuous vocalization is the nasal high pitched call most frequently heard during crepuscular flight. Peak vocalizations are reported 30 to 45 minutes after sunset according to most sources. No source mentioned 3 AM calls! In defense of their nests, the females make a rasping sound, and males clap their wings together. Males will also perform dives against fledglings, females and intruders such as humans or raccoons. Frequent flyers, the long-winged common nighthawk hunts on the wing for extended periods at high altitudes or in open areas. Flying insects are its preferred food source. The hunt ends shortly after dusk turns to night, and resumes before dawn. Needless to say I have been on alert hoping to see a nighthawk in flight. For me the easiest way to identify them is by their size – they are medium sized birds (about 8 inches in length) and their v shaped wings. Vision is presumed to be the main detection sense. The average flight speed of common nighthawks is about 15 miles an hour. The nighthawk breeds during the period of mid-March to early October. It most commonly has only one clutch per season. The bird is assumed to breed every year and is monogamous. Courting and mate selection occur partially in flight. The male dives and booms in an effort to garner female attention; the female may be in flight herself or stationary on the ground. The three calls I heard were located just outside my window. Females choose the nest site and are the primary incubators of two eggs for about 18 days. The female will leave the nest unattended during the evening in order to feed. The male will roost in a neighboring tree; he guards the nest by diving, hissing, wing-beating or booming at the site, and feeds his mate while she sits on the eggs. Later he helps feed his chicks. In the face of predation, common nighthawks do not abandon the nest easily; instead they likely rely on their cryptic coloration to camouflage themselves. In a month the fledglings will be independent. Because of their nesting habits these birds are easy prey for raccoons who covet their eggs. Dogs, coyotes, owls and foxes are other predators. During migration, common nighthawks may travel 2,500 – 4500 thousand miles, migrating by day or night in loose flocks (that could number in the thousands) between breeding grounds throughout the US and the birds’ wintering range in South America. Their populations are in decline for the usual reasons – loss of habitat, pesticides etc. During warm summer nights I watch them fly by my porch after insects, and have never tired of the sight. |
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