December 13, 2016
Baby opossum season is thankfully coming to a close, but only for a short while! We get quite a few calls here in the Live Animal Programs office when these bumbling troublemakers are out looking for a new place to call home.
Photo by Jill Franklin
A few years back, a young opossum made its home in the engine block of a Museum pool vehicle that hadn’t been used for a while. You can see with the leaves he dragged in, it was a perfectly cozy den. Luckily for him we didn’t start the engine and he was an easy eviction. More recently, a friend of an NHMLA Staffer wrote in a panic questioning how to get an opossum out of her house. It had pulled off a window screen and attempted to make itself at home.
Photo by Leslie Gordon
But we’re lucky. According to one rehabber I know, she gets calls several times a day early February/March and July/August. Of course, the young marsupials aren’t really looking for trouble, but they absolutely find it in our yards, homes, sheds, garages, engine blocks… you name it.
When they emerge from mom’s pouch and start riding on mom’s back, or tagging along behind her is the time when they start getting into trouble. If the mom did not become roadkill, and her scampering young were not grabbed up by a dog or cat, (the former scenarios comprise most of the rehabbers’ calls to rescue babies) they eventually start to look for a place to call their own. And they can call anything a home--under your garage, porch---almost anywhere.
We get our fair share of calls, but the reason it gets especially crazy for rehabbers is because opossums are virtual baby factories. Unlike many mammals, the baby season can happen multiple times a year, and at around 13 babies a litter, that’s a lot of babies! And they are in a hurry, too. They gestate for just 12 days, and when they are born (the size of honeybees), they have just a few minutes to race to one of 13 teats in mom’s pouch. They latch on and nurse for about 100 days, but toward the end of that period, they get large and start riding on mom’s back garbage-man-style. And at just about 3 to 4 months of age they are ready to go on their own! It is shocking to most people to see how small they are when they are technically ready to go. But remember--for an animal that lives maybe 3 years tops, every month is rather like 3 years of ours. And those first few months out of the pouch are clearly a real obstacle course for them.
So what to do if you run into one of these little kiddos when the next season comes around?
#1 Please don’t attract them by feeding. We strongly discourage feeding most any wild animals, especially nonnatives like opossums.
#2. If they are discovered in your trash cans, typically either gaping their giant mouths or playing dead, simply tip the can so they can get out, or put in a ”ladder” so they can escape. This can be a branch, an actual ladder, a crate, almost anything. Often they fall in and get stuck there. Remember, the playing dead routine is very effective. They go stiff, emit an odor and even allow flies to land on their open eyes! If you are unsure, walk away and ensure privacy/escape for at least 2 hours. If it is still there, you may have a dead opossum. If not, your ladder probably helped it get to freedom.
#3. If they are in your home, you can typically treat them like an equivalent-sized cat. If simply shooing them out with a broom didn’t work and they are very small, throwing a towel over them usually works. Wear heavy gloves if you are worried. If they are larger, your presence is usually enough. But leave a clear, unobstructed exit back out of your home and you'll make outdoors seem more appealing. Just make sure a curious dog or neighbor isn’t blocking the path.
The best advice is to be patient. They’re slow, but they really don’t want to tangle with humans.
City of Los Angeles Animals Services – Wildlife
Coast and Canyon Wildlife Rehabilitation
County of Los Angeles Animal Control – Wildlife
Pasadena Humane Society & SPCA – Wildlife
September 8, 2016
People all over L.A. have been finding baby lizards lately. Here are a few of my favorites:
Okay, so this one was found by me, but I mean come on is there anything cuter than a baby western fence lizard? Found while hiking in Griffith Park (August 9), I moved him off the trail so he wouldn't get stepped on.
My friend Yara Zair posted this picture to her Instagram account @califlorescence of a wee alligator lizard found while watering her garden in Hermon (August 26).
This baby lizard came via text message from fellow @nhmla staffer Laurel Dickow. Her cat found it in her Highland Park kitchen (August 17). She gently helped it to the out-of-doors, with the aid of a plastic cup.
Want to find out more about baby lizards? Check out NHMLA herpetologist, Greg Pauly's blog about them. More importantly, send us your baby lizard pictures. Not only will we create the cutest baby lizard collage you have ever seen, but it will also help science. Our RASCals citizen science project aims to better understand reptiles and amphibians in the region, including when they reproduce. You can share your baby lizard pics (or any reptile or amphibian photo for that matter) on social media using #NatureinLA, or send them via e-mail to firstname.lastname@example.org, or upload them directly to our project page on iNaturalist.
December 1, 2015
"What is that?” That was the question I asked my supervisor, Lila Higgins, back in the fall of 2012 when she brought in a strange looking object attached to a stick. “This is an ootheca, an egg case” she replied.
Ootheca seen on a Lion's Tail plant (Leonotis leonurus) Nov 3, 2015 in the Nature Gardens at NHMLA. Photo credit: Richard Smart
The ootheca was attached to a stick that Lila had brought inside to our office. Lila saw the stick lying on the ground in our Nature Gardens. Originally, she was going to place the stick into a nearby garden bed, but as she looked closer she noticed the ootheca. She recognized the shape of the ootheca to be that of a mantid egg case. Lila decided she would help the mantid babies by bringing them indoors, so they could develop without interference from predators or people.
I was very curious on how long it would take for the mantids to hatch out, and I wondered just how many and how large the young mantids would be when they emerged.
Days of checking the ootheca, turned into weeks, which turned into months. Then finally, in March of 2013, I heard Lila happily exclaim, “The ootheca hatched!” I ran over and was fascinated to see miniature mantids on her desk. They looked like the much larger mantids I was used to seeing, but teeny tiny. They were unbelievably cute. Lila even wrote her own blog post about it.
Baby mantid seen March 29, 2013. Photo credit: Lila Higgins
That experience made quite an impression on me, and it came to mind recently when I saw an ootheca attached to a Lion’s Tail plant in the Nature Gardens at NHMLA. My colleague, Richard Hayden, also recently posted an ootheca to Instagram, and that got me thinking that others were likely seeing these in L.A. and perhaps they didn’t know what they were.
Backside of an ootheca seen on a Catalina Perfume plant (Ribes viburnifolium) November 18, 2015 in the Nature Gardens at NHMLA. Photo credit: Richard Hayden
An ootheca can blend in very well with the plant they are attached to, so many people may not see them. Or people may think they are a sign of a sick or injured plant, and may remove the branches they are attached to, not realizing they were removing baby mantids from their gardens. Mantids are considered to be a beneficial insect since they will eat many garden pests such as grasshoppers, caterpillars, and aphids – you want mantids in your yard. The egg case actually starts as a frothy mass, but hardens to form a tough capsule that protects the growing young inside. Depending upon the mantid species, there can be anywhere from dozens to hundreds of mantids inside the ootheca, so by picking up sticks with an ootheca attached to them can help out a lot of mantids.
Ootheca on wire fence, Nov 23, 2013 in the Nature Gardens at NHMLA. Photo credit: Lila Higgins
Are you seeing oothecae in your part of L.A.? If so, I encourage you to let them be. The egg case will protect them from rain and temperature changes. If you see an ootheca attached to a broken stick laying on the ground then kindly place the stick in an area where they are less likely to be damaged by people. You can also take photo of the egg cases, and tag us using #NatureinLA so we can add your #ootheca photos to our L.A. Nature Map!
April 4, 2017
May 29, 2013
There are only 17 days left until our Nature Gardens and Nature Lab exhibits open! This makes me extremely excited and a little bit nauseous. To cope with the craziness, all I have to do is go and visit our new Nature Lab babies. Just in case you're feeling stressed out too, here's some baby love for you:
This is our new program opossum, Didelphis virginiana. She is a rescue animal that we were lucky enough to get from a local rehabber. She is blind in one eye (from a dog attack) which makes her unreleasable, and therefore our newest and cutest ambassador for L.A. wildlife.
Look she smiles, even though she's blind in one eye!
We also have 14 baby Norway rats, Rattus norvigicus! They are currently in training to move into their new home which will be decked out with lots of toys including ladders, wheels, tubes, and a see-saw or two.
Our baby rats snuggle up for a nap
You've already met our harvester ants, Pogonomyrmex spp., but here is a much better close up of the babies, aka larvae. You'll be able to visit them in the Nature Lab and watch their older sisters caring for them.
Antlings are cute too!
Recently one of our crayfish, Procambarus clarkii, had about 100 babies hatch. The fry (that's what you call a baby crayfish...not because they're good eating though) are about the size of a quarter and they zip around tank town like anything. This is mostly because they are looking for food, and trying to escape being eaten by the adults. What can I say, it's a hard life!
Biggy-baby and not-so-biggy-baby hanging out together.
Last but not least, here is one of our California Newts, Taricha torosa. Did you know that baby newts are called efts? If you are an avid L.A. Times crossworder, then you already know this, I swear eft is in the puzzle, like every other week!
Who could say no to one of our baby newts?
Want to meet our new babies? Come by the Nature Lab after it opens on June 9!
March 29, 2013
Lately, I've been so busy working on our new Nature Lab exhibit (OPENING THIS JUNE PEOPLE) that I rarely make it into my office anymore. Earlier this week, I popped in to check some e-mails (fun I know) and what do you think I found?An explosion of praying mantids!They were on my #2 pencils:
#cute They were on my scissors:
#thisisnotanadvertisement They hatched out of this ootheca (nerdy word for egg case):
If you ever find yourself in a similar situation, do not fret! All you need to do, is collect them in a jar and release them into the closest garden!Live long and prosper my tiny predatory friends, eat lots of pests and keep laying those oothecas!
May 17, 2012
Two weeks ago I told you I'd fill you in when I found dragonfly nymphs in our pond. I wasn't expecting to be able to give you this update so quickly, but SURPRISE, nature moves fast, people! In the last few weeks, I've found more than 50 dragonfly exuviae (the papery exoskeletons shed between molts) attached to the rocks of the pond. Of course, this prompted me to take out my dip net and look for nymphs in the water.Here's a picture of one I found:
Variegated Meadowhawk, Sympetrum corruptum, nymphFound May 5, 2012While I was dipping for the dragonfly nymphs, I found a lot of other macro-invertebrates. The list isn't very long, yet, but includes immature mosquitoes, chironomid midges, mayflies, and predacious diving beetles!
Mayfly nymph found May 5, 2012
Predacious diving beetle larva found in pondMay 4, 2012
I also found an adult predacious diving beetleonMay 5, 2012
April 13, 2012
Remember back in December, when I said I'd let you all know if we had baby Virginia opossums, Didelphis virginiana? Well it's spring, and right on cue they're here! Sam Easterson's camera traps have caught the babies (we think there are three) on video over the last week, and although many people don't find opossum babies cute, there are a few of us here at the Museum that do. Check them out and make your own assessment.
Out for ride on Mom's back!
Here are some interesting facts about opossum babies.
February 2, 2012
The North Campus is the proud parent of some baby oak trees!
Baby coast live oak sheltered by wallCarol Bornstein, our new Director of the North Campus Gardens, discovered a couple of oak saplings on one of her recent outdoor forays. The babies are coast live oaks, Quercus agrifolia, of which we recently planted several trees. We've also planted another species of oak, the Engelmann oak, Quercus engelmanni (we planted only three of this species). Both species reside in the section of the garden called the urban wilderness which is composed of several kinds of California native trees and shrubs.
This might be the mother oak!Oak trees provide amazing habitat value, and this is the main reason we planted them. By putting in such a sizable stand of oaks we're hoping our created wilderness will provide habitat for a whole slough of organisms rarely, if ever, seen before in Exposition Park. In just one oak tree it would be easy to find hundreds of species of associated plants and animals and thousands of individuals (think how many birds, ants, or squirrels you find in an oak tree). One species that has already shown up with our oaks, is a tiny insect called a whitefly.
Crown whitefly nymphs on oak leaf(each nymph is only 1 millimeter long)It was once again thanks to Carol, who was out inspecting our lovely oaks, that we discovered these small insects. At first we thought they might be a scale insect, but Brian Brown, the Museum's Curator of Entomology, identified them as crown whiteflies, Aleuroplatus coronata. As adults these small white homopterous insects (group of insects consisting of aphids, cicadas, scales, etc) fly around to find a suitable location to lay their eggs. For the crown whiteflies their plant of choice is oak. What you see in the image above are the nymphs (immature forms) of the whitefly, they have no wings but are covered with white waxy secretions that make them look like little crowns. The nymphs feed on the leaf's juices by piercing and inserting their mouthparts into the leaf. They can cause damage to the plant's health if their numbers are high enough, and they can also transmit disease organisms from one tree to another (not unlike mosquitos transmit malaria).Go check out your local oaks and see what animals live on them!
May 26, 2011
I know you've seen a lot of still images from the Black Phoebe, Sayornis nigricans, nest, but I just had to share this footage. Honestly, it is too good not to post. At the beginning of the video you'll see one of the adults (hard to tell if it's the mom or dad, they both help to care for the nestlings) feeding a European Honey Bee, Apis mellifera, to one of the young. This in and of itself is pretty awesome to see, but it gets even better! Remember the Bushtit post? I told you all about how some species of birds produce fecal sacs, to make it easier to keep the nest clean and disease free. Well, Black Phoebes also produce fecal sacs, and this video gives you an insight to this behavior. I'll let you judge for yourself whether you think it's gross, cool, or just plain interesting.
May 26, 2011
We've got more bird babies at the Page Museum (you know the one at the La Brea Tar Pits)! We were informed about an Allen's Hummingbird, Selasphorus sasin, nest in the atrium about two weeks ago, and jammed over to scope out the scene. When we arrived we found two tiny eggs in a beautifully crafted nest, suspended about ten feet up in one of the plants.
This past weekend Sam Easterson captured the footage below. I really like the way you can see the nest stretch as the nestlings move around. This is because the nest is partially constructed from spider webs! When constructing the nest, the female hummingbird collects materials such as plant fibers, moss, lichen, and small bits of bark or leaves. She also collects the spider silk for its elasticity. As the nestlings hatch and grow the nest can stretch with them! Check out the video to see it and then be wowed with feeding time. The first time I watched this footage, I couldn't help thinking about a sword swallowing circus act. Enjoy!